Which sending feature do you need?

Resend allows you to send both Transactional and Marketing emails.

A Transactional email is a message triggered by a user action or required for legal compliance. These emails are essential communications that users cannot unsubscribe from. Common examples include:

• Order confirmations
• Password reset emails
• Account notifications

Typically, transactional emails are 1-to-1 messages sent in response to a specific event.

A Marketing email is any email that is not transactional. These can be promotional, informative, or general communication messages.

Marketing emails are regulated by laws like CAN-SPAM (US) and CASL (Canada), and recipients must have the option to unsubscribe.

Examples of marketing emails:

• Promotional offers and discounts
• Newsletters
• Product updates

Marketing emails can be 1-to-1 (e.g., abandoned cart reminders) or 1-to-many (e.g., newsletters).

While not exhaustive, here's a table listing different examples of emails and the most appropriate type for each example.

You can send a Transactional email using:

• Our Send Email API
• Our Batch Send API (send up to 100 transactional emails in one API call)

You can send Marketing emails using:

• Resend no-code Editor – a collaborative interface for designing emails
• Broadcast API – for programmatic sending