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

[Tom Spettigue]

Hey all.






   Jul 13 16:00:00 doveadm(u...@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 u...@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 = postmas...@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

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:

OpenPGP_0xF838B5B45D794B26.asc
Description: OpenPGP public key

OpenPGP_signature
Description: OpenPGP digital signature