0

I've been running postfix & dovecot on separate VMs mounting /var/mail over NFS, and trying to replicate with mailsync, but I get a lot of email duplication so I really want to get dsync working on dovecot.

I followed the advice at the following blog to get 95% of the configuration correct. As postfix was using user/group=mail/mail and I got errors about that, I did change vmail to mail in the config files (also vmail wasn't added to the passwd file by dnf).

The one problem which seems tiny is that I get the following error every time dsync runs:

Local:
Mar 20 23:10:19 doveadm(banjo): Error: doveadm server disconnected before handshake: EOF
Mar 20 23:10:19 doveadm(banjo): Error: sync: Disconnected from remote: EOF
Remote:
Mar 20 23:11:06 doveadm: Fatal: setuid(XXXX(banjo) from userdb lookup) failed with euid=8(mail): Operation not permitted (This binary should probably be called with process user set to XXXX(banjo) instead of 8(mail))

The closest match I've found to this error suggests running dovecot as root, but doveadm processes already run as root. Furthermore, when I connect via IMAP dovecot has no problem reading/writing mail Inboxes and folders (everything has g+rws and group mail for postfix to work).

Has anyone got any other ideas for troubleshooting or even a better blog?

PS: Both VMs are - Fedora 33, kernel 5.9.16-200, dovecot-2.3.13-2, HW=qemu-kvm-5.1.0-9.fc33.x86_64 on HP Proliant MicroServers (one Microserver is Gen9 the other Gen10)

TIA Banjo.

banjo67xxx
  • 620
  • 5
  • 7

1 Answers1

0

Oops, when editing the username from vmail to mail, I accidentally added an extra line which was the cause.

service doveadm {
>>  user = mail  <<
    inet_listener {
        # port to listen on
        port = 12345
        # enable SSL
        #ssl = yes
    }
}

Now I have other problems.

banjo67xxx
  • 620
  • 5
  • 7