Hi,
We have mail server in production, with Exim + Dovecot + Mailman + OpenLDAP
- Roundcube webmail server. Openldap keeps mail accounts in db, exim uses lmtp transport to deliver messages to dovecot. Mailman is responsible for mailing lists, Roundcube webmail has managsieve module to create sieve filters.
Exim router,transport for dovecot
localuser: driver = accept domains = +local_domains : +virt_domains check_local_user transport = dovecot_lmtp cannot_route_message = Unknown account no_more
dovecot_lmtp: driver = lmtp socket = /var/spool/dovecot/lmtp batch_max = 500 rcpt_include_affixes
It worked perfectly, but after upgrade from Dovecot 2.2 to Dovecot 2.3 major version, I've found a lot of strange errors in exim panic.log
mail exim[7821] Failed to get user name for uid 1175 mail exim[7880]: Failed to get user name for uid 1173
etc where uids are ldap accounts and recognized by system (id 1175 shows user's name and group)
Even worse, some clients start to receive notify email with strange content, when sending email to mailing lists
user@domain.com Delay reason: error in redirect data: malformed address: someuser1@domain.com may not follow someuser2@domain.com in " someuser3@domain.com ..some crap here.." , where someuser addresses are not related to recipient address and unknown for sender.
After some investigation,I've found out that dovecot's sieve produces these errors (I suspect sieve vacation, when user creates vacation via Roundcube webmail). If set "submission_host = exim ip" in dovecot.conf, exim doesn't produce errors in panic.log anymore, but clients still receive email with malformed address. Please help me to find the root of the problem (some broken sieve filter in user's maildir, misconfiguration or breaking changes in new Dovecot version?)
Current software Gentoo with 4.14.90 kernel Dovecot-2.3.7.1 Exim-4.92.1 Mailman 2.1.29 Openldap-2.4.47 Roundcube-1.3.8
Dovecot.conf attached
Regards, Juri