Sending
Which sending feature do you need?
How to pick between our different sending features depending on your number of recipients and the nature of the message.
Why and when to use Topics?
Learn when to use Topics to improve deliverability and give recipients control over their email preferences.
Do you need to add an unsubscribe link to all of your emails sent with Resend?
Learn best practices about using unsubscribe links.
How do Dedicated IPs work?
When are Dedicated IPs helpful, and how can they be requested.
Sender email addresses in Resend
Learn how sending from an email address works on Resend.
What attachment types are not supported?
Learn which file attachment extensions you can't send.
How to fix CORS issues
Information on recommended options to avoid CORS errors when sending emails.
How to cancel a Broadcast
Cancel a scheduled Broadcast or stop one that is still sending.