Documentation
Everything needed to verify a domain, send your first message, and keep mail landing afterwards.
Start hereSetupAdd a domain, publish four records, send. An afternoon, most of it waiting on DNS.Get started
Reference
- Sending mailThe send endpoint in full, with attachments and inline images.
- Receiving mailAccept replies, read them, or have them pushed to you.
- Delivery & webhooksStatuses, bounces, suppression and signed webhooks.
- Errors & limitsEvery error code, and how the allowance is counted.
- SecurityHow your keys and data are kept separate from everyone else's.
Reading this with a coding agent?
There is an llms.txt on the API host that maps the whole API in plain text, which is a better input for a model than these pages.