poste.io compared
Most of them run the same engines
Dovecot, Rspamd, ClamAV - the parts are rarely what you are choosing between. What differs is how much of a stack you end up maintaining, and who is on the hook when it breaks.
Download and try it
Migrate my current server
Unlimited domains. Unlimited mailboxes. 349$/year PRO.
- mailcow vs poste.io Deployment: One container — mailcow: A docker compose stack
- iRedMail vs poste.io Deployment: One container on any Docker host — iRedMail: Installer that configures the host
- Stalwart vs poste.io Implementation: Proven upstream projects — Stalwart: One new all-in-one server
- Mail-in-a-Box vs poste.io The machine: Shared with your other services — Mail-in-a-Box: Expected to be dedicated
- docker-mailserver vs poste.io Administration: Web UI anyone can be handed — docker-mailserver: Config files and CLI
What you get either way
- Tested as one unit SMTP, IMAP, spam filtering, antivirus, webmail and administration are exercised together against real servers before an image ships. A version bump in one part cannot quietly break another.
- Backward compatible Your data and your configuration survive upgrades. We have not asked anyone to reinstall since 2014.
- No babysitting Upgrading is always the same thing: replace the container. No procedure, no migration script, seconds of downtime. We can do it for you.
- Monitoring included The server watches itself. If you want somebody else to be the one who notices, we can watch it from the outside and step in.
- Custom work is possible The whole thing is ours, so we are not waiting for an upstream project to accept a feature. Tell us what you need.
- Not a weekend project Shipping since 2014, 10M+ Docker pulls, and paying customers who have been with us for years.