July 2019 - dovecot - dovecot.org

Dovecot/MSQL issue
by Nathan 03 Jul '19

03 Jul '19

Hello, I'm trying to work through an issue that cropped up on a server I've been working on and haven't found a very good workaround. Dovecot is operating in a jailed environment. The configuration in dovecot-sql.conf.ext has been set appropriately with the host=127.0.0.1 (which works from a jailed environment) and when dovecot attempts to auth it appears to perform a reverse dns lookup and overwrites the host with the result localhost before using the msql credentials 'user'@'localhost' which then fails after timing out. I'm currently running version 2.2.33.2 of dovecot. The workaround seems to be to have two credentials for the same user. 'user@'localhost' and 'user'@'127.0.0.1'; postfix operates in a jail as well and works around the jail issue in the same way but doesn't overwrite the specified host with a reverse dns lookup. Anyone have any suggestions on how to handle this issue better? or maybe there's a way to force different behavior which I haven't yet found in the documentation? Any help is much appreciated. Best Regards.

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dovecot.index.log: duplicate transaction log sequence (3)
by mabi 02 Jul '19

02 Jul '19

Hello, I am running Dovecot 2.3.5.1 on OpenBSD 6.5 with RainLoop as IMAP webmail client and just noticed the following error messages about duplicate transaction log sequences in the index log: Jul 01 13:15:58 Error: imap(<REMOVED_EMAIL1>)<21324><TVSmwJyMd0C5D+Vb>: Transaction log /var/vmail/<REMOVED_DOMAIN>/<REMOVED_EMAIL1>/dovecot.index.log: duplicate transaction log sequence (3) Jul 02 16:33:35 Error: imap(<REMOVED_EMAIL2>)<6812><gn4yobOMJlW5D+Vb>: Transaction log /var/vmail/<REMOVED_DOMAIN>/<REMOVED_EMAIL2>/dovecot.list.index.log: duplicate transaction log sequence (2) Jul 02 16:33:35 Panic: imap(<REMOVED_EMAIL2>)<6812><gn4yobOMJlW5D+Vb>: file mail-index-write.c: line 137 (mail_index_write): assertion failed: (file->hdr.prev_file_seq == hdr->log_file_seq) Jul 02 16:33:35 Fatal: imap(<REMOVED_EMAIL2>)<6812><gn4yobOMJlW5D+Vb>: master: service(imap): child 6812 killed with signal 6 (core not dumped - https://dovecot.org/bugreport.html#coredumps - set service imap { drop_priv_before_exec=yes }) Could this problem occur because I am using a Linux NFS server to store all the mails mounted under /var/mail ? Any hints what I can do to avoid these error messages? Thank you in advance. Best regards, Mabi

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Variable expansion with variables containing '%' (ldap with 2.3.6)
by Matthias Lay 02 Jul '19

02 Jul '19

Hi, there seems to be a problem when expanding variables containing a single '%' in value in dovecot V2.3.6 having a user defined Variable in user_attrs like user_attrs = name=home=/maildir/%Ln, =myvar=path/%L{ldap:sAMAccountName} and sAMAccountName conains a '%', in my example "sonder%zeichen" leads to: lda(sonder%zeichen)<5723><ov9uCHjOGV1bFgAACDoIoQ>: Fatal: Failed to expand plugin setting myvar = 'path/sonder%zeichen': Unknown variable '%z' same setup works with dovecot 2.2.29 Any Feedback appreciated. Thanks. Matze

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Variable expansion with variables containing '%' (ldap with 2.3.6)
by Matthias Lay 01 Jul '19

01 Jul '19

Hi, there seems to be a problem when expanding variables containing a single '%' in value in dovecot V2.3.6 having a user defined Variable in user_attrs like user_attrs = name=home=/maildir/%Ln, =myvar=path/%L{ldap:sAMAccountName} and sAMAccountName conains a '%', in my example "sonder%zeichen" leads to: lda(sonder%zeichen)<5723><ov9uCHjOGV1bFgAACDoIoQ>: Fatal: Failed to expand plugin setting myvar = 'path/sonder%zeichen': Unknown variable '%z' same setup works with dovecot 2.2.29 Any Feedback appreciated. Thanks. Matze

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