Having an issue migrating mailboxes with the doveadm backup tool...

[Aki Tuomi]

Hi!

Did you check https://doc.dovecot.org/admin_manual/migrating_mailboxes/#migrating-mailboxes-over-imap 

Aki?

> On 14/07/2022 01:41 EEST Tom Spettigue <toms at zonit.com> wrote:
> 
> 
> Hey all.
> We've got some users that live on our primary email server (which lives in our internal network) that we need to migrate to a second email server (which lives in our DMZ). Both servers serve our domain, example.com, but our first email server runs UW-IMAP, while our newer second server is running dovecot.
> We need to get these users cleanly migrated over, with all of their emails, and we're trying to do so with the doveadm backup tool - figuring that it will probably "do" Dovecot better than a generic IMAP to IMAP tool. So far, no dice - we get the following error message:
> > Jul 13 16:00:00 doveadm(user at example.com): Fatal: All your namespaces have a location setting. Only namespaces with empty location settings are converted. (One namespace should default to mail_location setting)
> Here is the command I'm trying to run:
> > doveadm -c /etc/dovecot/dovecot-migration.conf -D -o imapc_user=user -o imapc_password=password backup -Ru user at example.com imapc:
> > 
> Here is the output of doveconf -n:
> 
> > # 2.3.16 (7e2e900c1a): /etc/dovecot/dovecot.conf
> >  # OS: Linux 4.18.0-372.16.1.el8_6.x86_64 x86_64 AlmaLinux release 8.6 (Sky Tiger) 
> >  # Hostname: example.com
> >  auth_mechanisms = plain login
> >  auth_verbose = yes
> >  disable_plaintext_auth = no
> >  info_log_path = /var/log/dovecot-info.log
> >  log_path = /var/log/dovecot.log
> >  mail_debug = yes
> >  mail_location = maildir:~/Maildir
> >  passdb {
> >  args = /etc/dovecot/passwd
> >  driver = passwd-file
> >  }
> >  postmaster_address = postmaster at example.com
> >  protocols = imap lmtp
> >  service auth {
> >  unix_listener /var/spool/postfix/private/auth {
> >  group = postfix
> >  mode = 0660
> >  user = postfix
> >  }
> >  }
> >  service lmtp {
> >  executable = lmtp -L
> >  inet_listener lmtp {
> >  address = 1.2.3.4 127.0.0.1 ::1
> >  port = 24
> >  }
> >  unix_listener /var/spool/postfix/private/dovecot-lmtp {
> >  group = postfix
> >  mode = 0666
> >  user = postfix
> >  }
> >  user = vmail
> >  }
> >  ssl_cert = </etc/letsencrypt/live/example.com/fullchain.pem
> >  ssl_dh = # hidden, use -P to show it
> >  ssl_key = # hidden, use -P to show it
> >  ssl_prefer_server_ciphers = yes
> >  userdb {
> >  args = username_format=%u /etc/dovecot/passwd
> >  auth_verbose = yes
> >  default_fields = uid=vmail gid=vmail home=/var/vmail/%u
> >  driver = passwd-file
> >  }
> >  protocol lmtp {
> >  lmtp_rawlog_dir = /tmp/dovecot/%u
> >  log_path = /var/log/dovecot-lmtp-debug.log
> >  }
> > 
> -- 
> Tom Spettigue
> Staff Engineer
> (720) 406-5269
> Zonit Structured Solutions
> www.zonit.com (http://www.zonit.com)