A Transactional Email is a one-time email related to a customer action such as registering for an account or making a purchase. Other examples of transactional emails include lost password emails, social sharing emails, and notification emails.
Since it is crucial that your transactional emails arrive at their destination quickly and reliably, we recommend using a service like Mandrill or SendGrid for these. Some advantages to using services like these, instead of your hosting account’s regular php mail functionality include:
Retrieve your Mandrill API from your Mandrill Account’s “SMTP & API Info” screen (in the Settings Sub-Menu)
Paste your Mandrill API Key into the API field on the IDC main settings page. Check the box to “Enable Mandrill” and click the Save button.
Enter your SendGrid API Key into the API field on IDC main settings page. Check the box to “Enable SendGrid” and click the Save button below.
In the “General Settings” section of the IDC main settings page, you must enter a “Company Name,” and a “Customer Service Email,” or your transactional emails will fail to send. The Company Name is who the email recipient sees as the sender. The Customer Service Email is who they will be sending to if they reply to your transactional email.