Migrating from A server to B server

amarc · Post by **amarc** » Wed 9. Sep 2026, 20:57

Hello,

I have Debian 12 installation (server A) that holds only mail domain(s) and users.. No webhositng or anything else.

I plan to install Debian 13 on server B and migrate only needed DB tables from A to B to keep domains, accounts,passwords, dkim's, aliases etc,etc.. + rsync /var/mail/vhosts/* content.

Question is: what exact tables I need in this case that hold mail related data? Considering it's Debian 12 to Debian 13 I guess it's not recommended to drop/import whole "keyhelp" database ? Or is it ? (it would be simpler)

Also, can I do same with "roundcube" database ?

Thank you