Keep your domains, mailboxes and historical email

We can perform the migration from mailcow for you, with minimal downtime. Your old server stays untouched and reachable until you switch DNS.

• 10M+ Docker pulls
• 2014 shipping since
• 0 mailboxes lost

How it goes

Both servers store mail in Dovecot, so the migration is an IMAP sync followed by a DNS change - and the stack of containers becomes one.

• Domains, mailboxes and aliases are recreated in poste.io.
• Historical email is synchronised over IMAP, folders and read state included.
• Sieve rules and redirects are carried over.
• The cutover is a DNS change once both servers hold the same mail.

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.