FAQ
Common questions about running and using Bunzzle.
What do I need to run Bunzzle?
A Linux server with outbound port 25 open and a static IP whose reverse DNS you can set, plus a domain whose DNS you control. Many providers block port 25 until you ask.
Is it free?
Yes. Bunzzle is open source under AGPL-3.0. You run it on your own server, so there is no per-email bill.
Does it host mailboxes?
No. Bunzzle sends transactional and bulk email from your apps. It has no IMAP and no campaign editor.
How do I send an email?
POST /emails with plain JSON fields. Retries are safe with an Idempotency-Key, and webhooks signed in the Standard Webhooks format tell you what happened.
Is it ready for production?
v0.2.0. Test it on a throwaway domain before sending real mail, and run bunzzle doctor after every change.
Can I verify what I install?
Yes. Releases ship with checksums, signatures, SBOMs and build provenance, and Verify a release shows how to check each one.