Most businesses use two types of emails- marketing emails and transactional emails. From a consumer perspective, the two types of emails differ on the basis of content. However, marketing email and transactional emails also differ on the basis of the way they are sent.
Transactional email are also called triggered email. Such emails are automatically sent on basis of user actions on a website e.g. purchase of products or lead signup or subscription to a newsletter. SMTP relay or APIs are normally used to send a transactional emails.
Here are some examples of transactional emails
Marketing emails differ from transactional emails in terms of the content. These are usually promotional emails or product announcements. You can take the help of SMTP platform or Web API for sending such emails.
Here are some examples of marketing emails: