Using the API to send emails

It is possible to use the Ortto API to send emails by using a dedicated transactional email API.

Sending transactional emails

Ortto supports sending transactional emails, optionally with attachments, via the API. You might want to do this to send tickets, e-books, receipts, invoices, booking confirmation and anything which requires an email to be delivered to a customer.

Example of sending a single transactional email to a single person

The example below sends a single transactional email to the email chris@ortto.com.

curl --request POST 'https://api.ap3api.com/v1/transactional/send' \
     --header 'X-Api-Key: YOUR-CUSTOM-API-KEY' \
     --header 'Content-Type: application/json' \
     --data-raw '{
      "asset": {
        "from_email": "jenny@ortto.com",
        "from_name": "Jenny Spencer",
        "cc": [
          "help@ortto.com"
        ],
        "subject": "Booking confirmation for {{ people.first-name }}",
        "email_name": "confirm-booking",
        "no_click_tracks": false,
        "no_opens_tracks": false,
        "html_body": "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\"><html xmlns=\"http://www.w3.org/1999/xhtml\" style=\"font-family:  Helvetica, Arial, sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\"><head><meta name=\"viewport\" content=\"width=device-width\" /><meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\" /><title>Booking confirmation for {{ people.first-name }}</title><style type=\"text/css\">img {max-width: 100%;}body {-webkit-font-smoothing: antialiased; -webkit-text-size-adjust: none; width: 100% !important; height: 100%; line-height: 1.6em;}body {background-color: #f6f6f6;}@media only screen and (max-width: 640px) {  body {    padding: 0 !important;  }  h1 {    font-weight: 800 !important; margin: 20px 0 5px !important;  }  h2 {    font-weight: 800 !important; margin: 20px 0 5px !important;  }  h3 {    font-weight: 800 !important; margin: 20px 0 5px !important;  }  h4 {    font-weight: 800 !important; margin: 20px 0 5px !important;  }  h1 {    font-size: 22px !important;  }  h2 {    font-size: 18px !important;  }  h3 {    font-size: 16px !important;  }  .container {    padding: 0 !important; width: 100% !important;  }  .content {    padding: 0 !important;  }  .content-wrap {    padding: 10px !important;  }  .invoice {    width: 100% !important;  }}</style></head><body itemscope itemtype=\"http://schema.org/EmailMessage\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; -webkit-font-smoothing: antialiased; -webkit-text-size-adjust: none; width: 100% !important; height: 100%; line-height: 1.6em; background-color: #f6f6f6; margin: 0;\" bgcolor=\"#f6f6f6\"><table class=\"body-wrap\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; width: 100%; background-color: #f6f6f6; margin: 0;\" bgcolor=\"#f6f6f6\"><tr style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\"><td style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; vertical-align: top; margin: 0;\" valign=\"top\"></td><td class=\"container\" width=\"600\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; vertical-align: top; display: block !important; max-width: 600px !important; clear: both !important; margin: 0 auto;\" valign=\"top\"><div class=\"content\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; max-width: 600px; display: block; margin: 0 auto; padding: 20px;\"><table class=\"main\" width=\"100%\" cellpadding=\"0\" cellspacing=\"0\" itemprop=\"action\" itemscope itemtype=\"http://schema.org/ConfirmAction\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; border-radius: 3px; background-color: #fff; margin: 0; border: 1px solid #e9e9e9;\" bgcolor=\"#fff\"><tr style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\"><td class=\"content-wrap\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; vertical-align: top; margin: 0; padding: 20px;\" valign=\"top\"><meta itemprop=\"name\" content=\"Confirm Email\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\" /><table width=\"100%\" cellpadding=\"0\" cellspacing=\"0\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\"><tr style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\"><td class=\"content-block\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; vertical-align: top; margin: 0; padding: 0 0 20px;\" valign=\"top\">Your official booking confirmation link is below.</td></tr><tr style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\"><td class=\"content-block\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; vertical-align: top; margin: 0; padding: 0 0 20px;\" valign=\"top\">To view or change your booking please click the link below.</td></tr><tr style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\"><td class=\"content-block\" itemprop=\"handler\" itemscope itemtype=\"http://schema.org/HttpActionHandler\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; vertical-align: top; margin: 0; padding: 0 0 20px;\" valign=\"top\"><a href=\"http://www.mywebsite.com/booking-confirmation/xx1\" class=\"btn-primary\" itemprop=\"url\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; color: #FFF; text-decoration: none; line-height: 2em; font-weight: bold; text-align: center; cursor: pointer; display: inline-block; border-radius: 5px; text-transform: capitalize; background-color: #348eda; margin: 0; border-color: #348eda; border-style: solid; border-width: 10px 20px;\">View your booking</a></td></tr><tr style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\"><td class=\"content-block\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; vertical-align: top; margin: 0; padding: 0 0 20px;\" valign=\"top\">&mdash; The Booking System</td></tr></table></td></tr></table><div class=\"footer\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; width: 100%; clear: both; color: #999; margin: 0; padding: 20px;\"><table width=\"100%\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\"><tr style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\"><td class=\"aligncenter content-block\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 12px; vertical-align: top; color: #999; text-align: center; margin: 0; padding: 0 0 20px;\" align=\"center\" valign=\"top\">Follow <a href=\"http://twitter.com/EXAMPLE\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 12px; color: #999; text-decoration: underline; margin: 0;\">us on Twitter</a>.</td></tr></table></div></div></td><td style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; vertical-align: top; margin: 0;\" valign=\"top\"></td></tr></table></body></html>",
        "liquid_syntax_enabled": true
      },
      "emails": [{
          "fields": {
            "bol::sp": true,
            "str::email": "chris@ortto.com",
            "str::first": "Chris",
            "str::last": "Sharkey",
            "str::soi-ctx": "API (Booking confirmation)"
          },
          "location": null
        }
      ],
      "merge_by": [
        "str::email"
      ],
      "merge_strategy": 2,
      "find_strategy": 0,
      "skip_non_existing": false
    }'

If you see an error like the following:

{"request_id":"0037288a-0882-427a-972b-63b7be6c0304","code":403,"error":"instance myinstance: transactional email feature not activated, please activate on any playbook or journey"}

This is because you do not yet have permission to send transactional emails using Ortto. There are several ways to seek permission. You can either do what the error message says and set up a transactional playbook or journey at which point you will be prompted to seek permission through the system itself. Or you can bypass that and just email help@ortto.com with a request to have transactional emails turned on for your account.

Transactional emails are only available on the Business and Enterprise plans.

Explanation of asset options for transactional emails

from_email

The from email can be anything, but ideally should be from a domain which you have registered for Ortto to send email from. If you send from a domain you have registered the deliverability rate will be higher. If you use a different domain, it will be sent "via autopilotmail2.io".

from_name

This can be any name you like.

cc

Carbon copy is optional, and is an array of email addresses you’d like a copy of each email to be sent to. This can be used if you need to keep an official record of all correspondence sent to a particular address, but usually you can just leave this out.

subject

The subject of the email.

email_name

This is a name you’ll use in Ortto to identify this email for filtering and reporting reasons. So make it is something that is easy to uniquely identify and associate with this email.

no_click_tracks

By default we will generate "Email clicked" activities for any links clicked in your transactional emails. This means that Ortto will rewrite the URLs of you links to go through a redirect before the customer reaches your URL. The user won’t notice as this happens quickly, but sometimes customers like to disable this feature so the URLs are not changed. This is done either because they have a very specific URL structure, or they are concerned about deliverability. Setting no_click_tracks to true will mean Ortto will not rewrite the links in your email.

no_open_tracks

If you set no_open_tracks to true, we will not include our tracking pixel in the email. This will mean that "Email opened" activities will not be generated in Ortto, and you won’t be able to report or filter on those as a consequence. However, removing the tracking pixel may help with the deliverability of your email given its transactional nature.

html_body

This is the HTML body for your email. You are required to provide the full email content here. This can be anything you like and it is up to you to make sure that the HTML is valid for as many email clients as you can, and test it to see that it renders correctly before sending to real customers. Because this is transactional email, you are not required to include an {{ unsubscribe }} link, but you can include this if you would like to. You can use any and all Ortto Liquid syntax in the email as long as the liquid_syntax_enabled option is set to true.

liquid_syntax_enabled

If this is set to false, Liquid tags will be ignored. Otherwise, they will be processed as in all Ortto emails. See our GUIDE TO LIQUID IN EMAILS for a list of how to use these correctly.

Notes about people

The people you send emails to do not necessarily need to exist in your Ortto CDP prior to sending them an email. You can read about merge strategy here. If you do not want to send transactional emails to people who do not already exist in the CDP, then provide the skip_non_existing option as true.

As part of sending transactional email you can add/merge fields for customers in the record provided to this endpoint. For a full description of how this works see here.

Example of sending a single transactional email to a group of people

You can send the same transactional email to a group of people just by including more records in the array of "emails" provided in the call. This will send the same email to each of the people listed, but obviously interpolating their merge tags into the email.

curl --request POST 'https://api.ap3api.com/v1/transactional/send' \
     --header 'X-Api-Key: YOUR-CUSTOM-API-KEY' \
     --header 'Content-Type: application/json' \
     --data-raw '{
      "asset": {
        "from_email": "jenny@ortto.com",
        "from_name": "Jenny Spencer",
        "cc": [
          "help@ortto.com"
        ],
        "subject": "Confirm that you still want to hear from us, {{ people.first-name }}",
        "email_name": "confirm-subscription",
        "no_click_tracks": false,
        "no_opens_tracks": false,
        "html_body": "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\"><html xmlns=\"http://www.w3.org/1999/xhtml\" style=\"font-family:  Helvetica, Arial, sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\"><head><meta name=\"viewport\" content=\"width=device-width\" /><meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\" /><title>Confirm that you still want to hear from us, {{ people.first-name }}</title><style type=\"text/css\">img {max-width: 100%;}body {-webkit-font-smoothing: antialiased; -webkit-text-size-adjust: none; width: 100% !important; height: 100%; line-height: 1.6em;}body {background-color: #f6f6f6;}@media only screen and (max-width: 640px) {  body {    padding: 0 !important;  }  h1 {    font-weight: 800 !important; margin: 20px 0 5px !important;  }  h2 {    font-weight: 800 !important; margin: 20px 0 5px !important;  }  h3 {    font-weight: 800 !important; margin: 20px 0 5px !important;  }  h4 {    font-weight: 800 !important; margin: 20px 0 5px !important;  }  h1 {    font-size: 22px !important;  }  h2 {    font-size: 18px !important;  }  h3 {    font-size: 16px !important;  }  .container {    padding: 0 !important; width: 100% !important;  }  .content {    padding: 0 !important;  }  .content-wrap {    padding: 10px !important;  }  .invoice {    width: 100% !important;  }}</style></head><body itemscope itemtype=\"http://schema.org/EmailMessage\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; -webkit-font-smoothing: antialiased; -webkit-text-size-adjust: none; width: 100% !important; height: 100%; line-height: 1.6em; background-color: #f6f6f6; margin: 0;\" bgcolor=\"#f6f6f6\"><table class=\"body-wrap\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; width: 100%; background-color: #f6f6f6; margin: 0;\" bgcolor=\"#f6f6f6\"><tr style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\"><td style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; vertical-align: top; margin: 0;\" valign=\"top\"></td><td class=\"container\" width=\"600\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; vertical-align: top; display: block !important; max-width: 600px !important; clear: both !important; margin: 0 auto;\" valign=\"top\"><div class=\"content\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; max-width: 600px; display: block; margin: 0 auto; padding: 20px;\"><table class=\"main\" width=\"100%\" cellpadding=\"0\" cellspacing=\"0\" itemprop=\"action\" itemscope itemtype=\"http://schema.org/ConfirmAction\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; border-radius: 3px; background-color: #fff; margin: 0; border: 1px solid #e9e9e9;\" bgcolor=\"#fff\"><tr style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\"><td class=\"content-wrap\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; vertical-align: top; margin: 0; padding: 20px;\" valign=\"top\"><meta itemprop=\"name\" content=\"Confirm Email\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\" /><table width=\"100%\" cellpadding=\"0\" cellspacing=\"0\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\"><tr style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\"><td class=\"content-block\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; vertical-align: top; margin: 0; padding: 0 0 20px;\" valign=\"top\">Your official booking confirmation link is below.</td></tr><tr style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\"><td class=\"content-block\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; vertical-align: top; margin: 0; padding: 0 0 20px;\" valign=\"top\">To confirm you still wish to receive emails from us, click the link below.</td></tr><tr style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\"><td class=\"content-block\" itemprop=\"handler\" itemscope itemtype=\"http://schema.org/HttpActionHandler\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; vertical-align: top; margin: 0; padding: 0 0 20px;\" valign=\"top\"><a href=\"http://www.mywebsite.com/confirm-sub\" class=\"btn-primary\" itemprop=\"url\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; color: #FFF; text-decoration: none; line-height: 2em; font-weight: bold; text-align: center; cursor: pointer; display: inline-block; border-radius: 5px; text-transform: capitalize; background-color: #348eda; margin: 0; border-color: #348eda; border-style: solid; border-width: 10px 20px;\">View your booking</a></td></tr><tr style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\"><td class=\"content-block\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; vertical-align: top; margin: 0; padding: 0 0 20px;\" valign=\"top\">&mdash; The Booking System</td></tr></table></td></tr></table><div class=\"footer\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; width: 100%; clear: both; color: #999; margin: 0; padding: 20px;\"><table width=\"100%\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\"><tr style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\"><td class=\"aligncenter content-block\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 12px; vertical-align: top; color: #999; text-align: center; margin: 0; padding: 0 0 20px;\" align=\"center\" valign=\"top\">Follow <a href=\"http://twitter.com/EXAMPLE\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 12px; color: #999; text-decoration: underline; margin: 0;\">us on Twitter</a>.</td></tr></table></div></div></td><td style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; vertical-align: top; margin: 0;\" valign=\"top\"></td></tr></table></body></html>",
        "liquid_syntax_enabled": true
      },
      "emails": [{
          "fields": {
            "str::email": "chris+test1@ortto.com",
            "str::first": "Chris1",
            "str::last": "Test1",
            "bol::sp": true,
            "str::soi-ctx": "API (Subscription confirmation)"
          }
        },
        {
          "fields": {
            "str::email": "chris+test2@ortto.com",
            "str::first": "Chris2",
            "str::last": "Test2",
            "bol::sp": true,
            "str::soi-ctx": "API (Subscription confirmation)"
          }
        },
        {
          "fields": {
            "str::email": "chris+test3@ortto.com",
            "str::first": "Chris3",
            "str::last": "Test3",
            "bol::sp": true,
            "str::soi-ctx": "API (Subscription confirmation)"
          }
        },
        {
          "fields": {
            "str::email": "chris+test4@ortto.com",
            "str::first": "Chris4",
            "str::last": "Test4",
            "bol::sp": true,
            "str::soi-ctx": "API (Subscription confirmation)"
          }
        }
      ],
      "merge_by": [
        "str::email"
      ],
      "merge_strategy": 2,
      "find_strategy": 0,
      "skip_non_existing": false
    }'

Example of sending different transactional emails to a group of people on a case by case basis

If you would like to send a different variation of an email to a particular person, you can provide an "asset" per person in your "emails" array. This doesn’t have to be for every contact. In the example below, we have a global asset which is sent as the default, then we override it for chris+override@ortto.com who receives different email markup. You can do this for up to 100 people per payload.

curl --request POST 'https://api.ap3api.com/v1/transactional/send' \
     --header 'X-Api-Key: YOUR-CUSTOM-API-KEY' \
     --header 'Content-Type: application/json' \
     --data-raw '{
      "asset": {
        "from_email": "jenny@ortto.com",
        "from_name": "Jenny Spencer",
        "cc": [
          "help@ortto.com"
        ],
        "subject": "Confirm that you still want to hear from us, {{ people.first-name }}",
        "email_name": "confirm-subscription",
        "no_click_tracks": false,
        "no_opens_tracks": false,
        "html_body": "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\"><html xmlns=\"http://www.w3.org/1999/xhtml\" style=\"font-family:  Helvetica, Arial, sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\"><head><meta name=\"viewport\" content=\"width=device-width\" /><meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\" /><title>Confirm that you still want to hear from us, {{ people.first-name }}</title><style type=\"text/css\">img {max-width: 100%;}body {-webkit-font-smoothing: antialiased; -webkit-text-size-adjust: none; width: 100% !important; height: 100%; line-height: 1.6em;}body {background-color: #f6f6f6;}@media only screen and (max-width: 640px) {  body {    padding: 0 !important;  }  h1 {    font-weight: 800 !important; margin: 20px 0 5px !important;  }  h2 {    font-weight: 800 !important; margin: 20px 0 5px !important;  }  h3 {    font-weight: 800 !important; margin: 20px 0 5px !important;  }  h4 {    font-weight: 800 !important; margin: 20px 0 5px !important;  }  h1 {    font-size: 22px !important;  }  h2 {    font-size: 18px !important;  }  h3 {    font-size: 16px !important;  }  .container {    padding: 0 !important; width: 100% !important;  }  .content {    padding: 0 !important;  }  .content-wrap {    padding: 10px !important;  }  .invoice {    width: 100% !important;  }}</style></head><body itemscope itemtype=\"http://schema.org/EmailMessage\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; -webkit-font-smoothing: antialiased; -webkit-text-size-adjust: none; width: 100% !important; height: 100%; line-height: 1.6em; background-color: #f6f6f6; margin: 0;\" bgcolor=\"#f6f6f6\"><table class=\"body-wrap\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; width: 100%; background-color: #f6f6f6; margin: 0;\" bgcolor=\"#f6f6f6\"><tr style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\"><td style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; vertical-align: top; margin: 0;\" valign=\"top\"></td><td class=\"container\" width=\"600\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; vertical-align: top; display: block !important; max-width: 600px !important; clear: both !important; margin: 0 auto;\" valign=\"top\"><div class=\"content\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; max-width: 600px; display: block; margin: 0 auto; padding: 20px;\"><table class=\"main\" width=\"100%\" cellpadding=\"0\" cellspacing=\"0\" itemprop=\"action\" itemscope itemtype=\"http://schema.org/ConfirmAction\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; border-radius: 3px; background-color: #fff; margin: 0; border: 1px solid #e9e9e9;\" bgcolor=\"#fff\"><tr style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\"><td class=\"content-wrap\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; vertical-align: top; margin: 0; padding: 20px;\" valign=\"top\"><meta itemprop=\"name\" content=\"Confirm Email\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\" /><table width=\"100%\" cellpadding=\"0\" cellspacing=\"0\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\"><tr style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\"><td class=\"content-block\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; vertical-align: top; margin: 0; padding: 0 0 20px;\" valign=\"top\">Your official booking confirmation link is below.</td></tr><tr style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\"><td class=\"content-block\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; vertical-align: top; margin: 0; padding: 0 0 20px;\" valign=\"top\">To confirm you still wish to receive emails from us, click the link below.</td></tr><tr style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\"><td class=\"content-block\" itemprop=\"handler\" itemscope itemtype=\"http://schema.org/HttpActionHandler\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; vertical-align: top; margin: 0; padding: 0 0 20px;\" valign=\"top\"><a href=\"http://www.mywebsite.com/confirm-sub\" class=\"btn-primary\" itemprop=\"url\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; color: #FFF; text-decoration: none; line-height: 2em; font-weight: bold; text-align: center; cursor: pointer; display: inline-block; border-radius: 5px; text-transform: capitalize; background-color: #348eda; margin: 0; border-color: #348eda; border-style: solid; border-width: 10px 20px;\">View your booking</a></td></tr><tr style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\"><td class=\"content-block\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; vertical-align: top; margin: 0; padding: 0 0 20px;\" valign=\"top\">&mdash; The Booking System</td></tr></table></td></tr></table><div class=\"footer\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; width: 100%; clear: both; color: #999; margin: 0; padding: 20px;\"><table width=\"100%\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\"><tr style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\"><td class=\"aligncenter content-block\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 12px; vertical-align: top; color: #999; text-align: center; margin: 0; padding: 0 0 20px;\" align=\"center\" valign=\"top\">Follow <a href=\"http://twitter.com/EXAMPLE\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 12px; color: #999; text-decoration: underline; margin: 0;\">us on Twitter</a>.</td></tr></table></div></div></td><td style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; vertical-align: top; margin: 0;\" valign=\"top\"></td></tr></table></body></html>",
        "liquid_syntax_enabled": true
      },
      "emails": [{
          "fields": {
            "str::email": "chris+test1@ortto.com",
            "str::first": "Chris1",
            "str::last": "Test1",
            "bol::sp": true,
            "str::soi-ctx": "API (Subscription confirmation)"
          }
        },
        {
          "fields": {
            "str::email": "chris+test2@ortto.com",
            "str::first": "Chris2",
            "str::last": "Test2",
            "bol::sp": true,
            "str::soi-ctx": "API (Subscription confirmation)"
          }
        },
        {
          "fields": {
            "str::email": "chris+test3@ortto.com",
            "str::first": "Chris3",
            "str::last": "Test3",
            "bol::sp": true,
            "str::soi-ctx": "API (Subscription confirmation)"
          }
        },
        {
          "fields": {
            "str::email": "chris+override@ortto.com",
            "str::first": "Chris4",
            "str::last": "Override",
            "bol::sp": true,
            "str::soi-ctx": "API (Subscription confirmation)"
          },
          "asset": {
            "from_email": "override@ortto.com",
            "from_name": "Override Department",
            "subject": "An overridden subject for you, {{ people.first-name }}",
            "email_name": "confirm-subscription-override",
            "no_click_tracks": false,
            "no_opens_tracks": false,
            "html_body": "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\"><html xmlns=\"http://www.w3.org/1999/xhtml\" style=\"font-family:  Helvetica, Arial, sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\"><head><meta name=\"viewport\" content=\"width=device-width\" /><meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\" /><title>Confirm that you still want to hear from us, {{ people.first-name }}</title><style type=\"text/css\">img {max-width: 100%;}body {-webkit-font-smoothing: antialiased; -webkit-text-size-adjust: none; width: 100% !important; height: 100%; line-height: 1.6em;}body {background-color: #f6f6f6;}@media only screen and (max-width: 640px) {  body {    padding: 0 !important;  }  h1 {    font-weight: 800 !important; margin: 20px 0 5px !important;  }  h2 {    font-weight: 800 !important; margin: 20px 0 5px !important;  }  h3 {    font-weight: 800 !important; margin: 20px 0 5px !important;  }  h4 {    font-weight: 800 !important; margin: 20px 0 5px !important;  }  h1 {    font-size: 22px !important;  }  h2 {    font-size: 18px !important;  }  h3 {    font-size: 16px !important;  }  .container {    padding: 0 !important; width: 100% !important;  }  .content {    padding: 0 !important;  }  .content-wrap {    padding: 10px !important;  }  .invoice {    width: 100% !important;  }}</style></head><body itemscope itemtype=\"http://schema.org/EmailMessage\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; -webkit-font-smoothing: antialiased; -webkit-text-size-adjust: none; width: 100% !important; height: 100%; line-height: 1.6em; background-color: #f6f6f6; margin: 0;\" bgcolor=\"#f6f6f6\"><table class=\"body-wrap\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; width: 100%; background-color: #f6f6f6; margin: 0;\" bgcolor=\"#f6f6f6\"><tr style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\"><td style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; vertical-align: top; margin: 0;\" valign=\"top\"></td><td class=\"container\" width=\"600\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; vertical-align: top; display: block !important; max-width: 600px !important; clear: both !important; margin: 0 auto;\" valign=\"top\"><div class=\"content\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; max-width: 600px; display: block; margin: 0 auto; padding: 20px;\"><table class=\"main\" width=\"100%\" cellpadding=\"0\" cellspacing=\"0\" itemprop=\"action\" itemscope itemtype=\"http://schema.org/ConfirmAction\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; border-radius: 3px; background-color: #fff; margin: 0; border: 1px solid #e9e9e9;\" bgcolor=\"#fff\"><tr style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\"><td class=\"content-wrap\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; vertical-align: top; margin: 0; padding: 20px;\" valign=\"top\"><meta itemprop=\"name\" content=\"Confirm Email\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\" /><table width=\"100%\" cellpadding=\"0\" cellspacing=\"0\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\"><tr style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\"><td class=\"content-block\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; vertical-align: top; margin: 0; padding: 0 0 20px;\" valign=\"top\">Your official booking confirmation link is below.</td></tr><tr style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\"><td class=\"content-block\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; vertical-align: top; margin: 0; padding: 0 0 20px;\" valign=\"top\">To confirm you still wish to receive emails from us, click the link below. NOTE: You have received different email content to everyone else.</td></tr><tr style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\"><td class=\"content-block\" itemprop=\"handler\" itemscope itemtype=\"http://schema.org/HttpActionHandler\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; vertical-align: top; margin: 0; padding: 0 0 20px;\" valign=\"top\"><a href=\"http://www.mywebsite.com/confirm-sub\" class=\"btn-primary\" itemprop=\"url\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; color: #FFF; text-decoration: none; line-height: 2em; font-weight: bold; text-align: center; cursor: pointer; display: inline-block; border-radius: 5px; text-transform: capitalize; background-color: #348eda; margin: 0; border-color: #348eda; border-style: solid; border-width: 10px 20px;\">View your booking</a></td></tr><tr style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\"><td class=\"content-block\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; vertical-align: top; margin: 0; padding: 0 0 20px;\" valign=\"top\">&mdash; The Booking System</td></tr></table></td></tr></table><div class=\"footer\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; width: 100%; clear: both; color: #999; margin: 0; padding: 20px;\"><table width=\"100%\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\"><tr style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\"><td class=\"aligncenter content-block\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 12px; vertical-align: top; color: #999; text-align: center; margin: 0; padding: 0 0 20px;\" align=\"center\" valign=\"top\">Follow <a href=\"http://twitter.com/EXAMPLE\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 12px; color: #999; text-decoration: underline; margin: 0;\">us on Twitter</a>.</td></tr></table></div></div></td><td style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; vertical-align: top; margin: 0;\" valign=\"top\"></td></tr></table></body></html>",
            "liquid_syntax_enabled": true
          }
        }
      ],
      "merge_by": [
        "str::email"
      ],
      "merge_strategy": 2,
      "find_strategy": 0,
      "skip_non_existing": false
    }'

Adding attachments to transactional emails

The Ortto transactional email API supports up to 5 attachments per email. Attachments need to be base64 encoded and have the correct MIME type in order to be sent correctly. Here’s a basic example of sending an image as an attachment:

curl --request POST 'https://api.ap3api.com/v1/transactional/send' \
     --header 'X-Api-Key: YOUR-CUSTOM-API-KEY' \
     --header 'Content-Type: application/json' \
     --data-raw '{
      "asset": {
        "from_email": "steve.spencer@ortto.com",
        "from_name": "Steve Spencer",
        "subject": "IMPORTANT: a picture ",
        "email_name": "confirm-booking",
        "no_click_tracks": false,
        "no_opens_tracks": false,
        "html_body": "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\"><html xmlns=\"http://www.w3.org/1999/xhtml\" style=\"font-family:  Helvetica, Arial, sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\"><head><meta name=\"viewport\" content=\"width=device-width\" /><meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\" /><title>Booking confirmation for {{ people.first-name }}</title><style type=\"text/css\">img {max-width: 100%;}body {-webkit-font-smoothing: antialiased; -webkit-text-size-adjust: none; width: 100% !important; height: 100%; line-height: 1.6em;}body {background-color: #f6f6f6;}@media only screen and (max-width: 640px) {  body {    padding: 0 !important;  }  h1 {    font-weight: 800 !important; margin: 20px 0 5px !important;  }  h2 {    font-weight: 800 !important; margin: 20px 0 5px !important;  }  h3 {    font-weight: 800 !important; margin: 20px 0 5px !important;  }  h4 {    font-weight: 800 !important; margin: 20px 0 5px !important;  }  h1 {    font-size: 22px !important;  }  h2 {    font-size: 18px !important;  }  h3 {    font-size: 16px !important;  }  .container {    padding: 0 !important; width: 100% !important;  }  .content {    padding: 0 !important;  }  .content-wrap {    padding: 10px !important;  }  .invoice {    width: 100% !important;  }}</style></head><body itemscope itemtype=\"http://schema.org/EmailMessage\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; -webkit-font-smoothing: antialiased; -webkit-text-size-adjust: none; width: 100% !important; height: 100%; line-height: 1.6em; background-color: #f6f6f6; margin: 0;\" bgcolor=\"#f6f6f6\"><table class=\"body-wrap\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; width: 100%; background-color: #f6f6f6; margin: 0;\" bgcolor=\"#f6f6f6\"><tr style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\"><td style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; vertical-align: top; margin: 0;\" valign=\"top\"></td><td class=\"container\" width=\"600\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; vertical-align: top; display: block !important; max-width: 600px !important; clear: both !important; margin: 0 auto;\" valign=\"top\"><div class=\"content\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; max-width: 600px; display: block; margin: 0 auto; padding: 20px;\"><table class=\"main\" width=\"100%\" cellpadding=\"0\" cellspacing=\"0\" itemprop=\"action\" itemscope itemtype=\"http://schema.org/ConfirmAction\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; border-radius: 3px; background-color: #fff; margin: 0; border: 1px solid #e9e9e9;\" bgcolor=\"#fff\"><tr style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\"><td class=\"content-wrap\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; vertical-align: top; margin: 0; padding: 20px;\" valign=\"top\"><meta itemprop=\"name\" content=\"Confirm Email\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\" /><table width=\"100%\" cellpadding=\"0\" cellspacing=\"0\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\"><tr style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\"><td class=\"content-block\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; vertical-align: top; margin: 0; padding: 0 0 20px;\" valign=\"top\">Please see attached image.</td></tr><tr style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\"><td class=\"content-block\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; vertical-align: top; margin: 0; padding: 0 0 20px;\" valign=\"top\">To view or change your booking please click the link below.</td></tr><tr style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\"><td class=\"content-block\" itemprop=\"handler\" itemscope itemtype=\"http://schema.org/HttpActionHandler\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; vertical-align: top; margin: 0; padding: 0 0 20px;\" valign=\"top\"><a href=\"$\" class=\"btn-primary\" itemprop=\"url\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; color: #FFF; text-decoration: none; line-height: 2em; font-weight: bold; text-align: center; cursor: pointer; display: inline-block; border-radius: 5px; text-transform: capitalize; background-color: #348eda; margin: 0; border-color: #348eda; border-style: solid; border-width: 10px 20px;\">See more images</a></td></tr><tr style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\"><td class=\"content-block\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; vertical-align: top; margin: 0; padding: 0 0 20px;\" valign=\"top\">&mdash; The Booking System</td></tr></table></td></tr></table><div class=\"footer\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; width: 100%; clear: both; color: #999; margin: 0; padding: 20px;\"><table width=\"100%\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\"><tr style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;\"><td class=\"aligncenter content-block\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 12px; vertical-align: top; color: #999; text-align: center; margin: 0; padding: 0 0 20px;\" align=\"center\" valign=\"top\">Follow <a href=\"http://twitter.com/EXAMPLE\" style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 12px; color: #999; text-decoration: underline; margin: 0;\">us on Twitter</a>.</td></tr></table></div></div></td><td style=\"font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; vertical-align: top; margin: 0;\" valign=\"top\"></td></tr></table></body></html>",
        "liquid_syntax_enabled": true,
        "attachments": [
            {
                "filename": "ortto.png",
                "content_type": "image/png",
                "content": 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"
            }
        ]
      },
      "emails": [{
          "fields": {
            "bol::sp": true,
            "str::email": "chris@ortto.com",
            "str::first": "Chris",
            "str::last": "Sharkey",
            "str::soi-ctx": "API (Booking confirmation)"
          },
          "location": null
        }
      ],
      "merge_by": [
        "str::email"
      ],
      "merge_strategy": 2,
      "find_strategy": 0,
      "skip_non_existing": false
    }'

You should use whichever programming language you are using to send transactional email to base64 encode your assets.

If you don’t know how, or would like a way to do this on a case per case basis you can do it here:

Transactional email limits

Total request size

4MB

Individual attachment limit (once encoded to base64)

500kb

Individual email size

1MB

Emails per request

100

CCs per email

5

Standard API rate limits

All standard API rate limits apply, *see here for details.