December 2023 - dovecot

dovecot submission max line length
by Kees van Vloten 13 Dec '23

13 Dec '23

Hi all, After upgrading Debian Bullseye (Dovecot 2.3.13) to Bookworm (Dovcecot 2.3.19), submission-login returns an error on Kerberos authentication: "Client sent invalid command: Command line is too long". When I initially set this up on Bullseye I have seen the same issue, but adding "imap_max_line_length = 2M" solved it. Now with 2.3.19 kerberos authentication still works (with this setting) for imap connections but it stopped working for submission. Is there a new config setting for submission-login that I missed? Or is this a bug in 2.3.19? - Kees.

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Username used by dovecot to access database certificate and key files
by John Fawcett 08 Dec '23

08 Dec '23

Hi does anyone happen to know the username under which dovecot accesses the certificate and key files when connecting to a mariadb database with ssl? I can't seem to get dovecot to read the files without a "other" readable bit set. I have dovecot users in mysql with the following connect string in dovecot-sql.conf.ext connect = host=x.x.x host=y.y.y host=z.z.z dbname=maildb user=mailuser password=xxxxxx \ ssl_ca=/etc/ssl/mysql/ca-cert.pem \ ssl_cert=/etc/ssl/mysql/client-cert.pem \ ssl_key=/etc/ssl/mysql/client-key.pem \ ssl_verify_server_cert=yes The certificate and key files in /etc/ssl/mysql/ are owned by root with group users: ls -l /etc/ssl/mysql total 12 -r--r--r--. 1 root root 2041 Jun 22 15:32 ca-cert.pem -r--r--r--. 1 root users 1907 Jun 22 15:32 client-cert.pem -r--r--r--. 1 root users 3272 Jun 22 15:32 client-key.pem For my test dovecot, dovenull and vmail are all members of group users: grep users /etc/group users:x:100:postfix,dovecot,dovenull,vmail If I remove the "other" readable attribute on the certificate and key files, dovecot complains it can't connect to the db server: auth: Error: mysql(x.x.x): Connect failed to database (maildb): TLS/SSL error: Permission denied (13) - waiting for 1 seconds before retry I realize it only adds marginal security to not have these files world readable, but still it is puzzling why dovecot cannot read them in that case. Can anyone see what I am missing? Thanks John

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Unlocking Entertainment Excellence: Explore jGuru's Latest Netflix Series Guide
by Angelique Medina 08 Dec '23

08 Dec '23

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Compiler error
by Goetz Schultz 06 Dec '23

06 Dec '23

Hi, I have upgraded my system to FreeBSD14 and tried to recompile dovecot. The following error is thrown now (It did compile on FBSD13): <quote> test-mail-index-transaction-update.c:650:36: error: incompatible pointer to integer conversion passing 'char *(*)(int, int)' to parameter of type 'time_t' (aka 'long') [-Wint-conversion] mail_index_update_day_headers(t, tests[i].now + timezone); ^~~~~~~~~~~~~~~~~~~~~~~ </quote> (t, tests[i].now + timezone); ^~~~~~~~~~~~~~~~~~~~~~~ Is there a patch or something like that to compensate? -- Thanks and regards Goetz R Schultz ---------------->8---------------- Quis custodiet ipsos custodes? /"\ \ / ASCII Ribbon Campaign X against HTML e-mail / \ ----------------8<---------------- ---------------------------->8------------------------------ /"\ \ / ASCII Ribbon Campaign X against HTML e-mail / \ This message is transmitted on 100% recycled electrons. ---------------------------->8------------------------------ Unsigned message - no responsibillity that content is not altered

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replicator: Panic: data stack: Out of memory when allocating 268435496 bytes
by Gerben Wierda 06 Dec '23

06 Dec '23

One step further in my quest to create a replacement mail server. I now have my old mail server (2.3.19.1, macOS + MacPorts) and my new (2.3.20, Alpine Linux, Docker, apk package). When I turn on replication it works, but, after a while I see: Jan 06 00:50:31 replicator: Panic: data stack: Out of memory when allocating 268435496 bytes Jan 06 00:50:32 replicator: Fatal: master: service(replicator): child 133 killed with signal 6 (core dumped) Jan 06 00:50:32 lmtp(pid 195 user sysbh): Warning: replication(sysbh): Sync failure: Jan 06 00:50:32 lmtp(pid 195 user sysbh): Warning: replication(sysbh): Remote sent invalid input: - I've removed synchronous operation for now (found a message on the net suggesting that) but is this known and what does it mean? Gerben Wierda (LinkedIn <https://www.linkedin.com/in/gerbenwierda>) R&A IT Strategy <https://ea.rna.nl/> (main site) Book: Chess and the Art of Enterprise Architecture <https://ea.rna.nl/the-book/> Book: Mastering ArchiMate <https://ea.rna.nl/the-book-edition-iii/>

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Enhance Your Website Content: Logicsofts' Expert Tips
by Angelique Medina 04 Dec '23

04 Dec '23

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auth_mechanisms per listener or local_name?
by Kees van Vloten 01 Dec '23

01 Dec '23

Hi all, I would like to use kerberos authentication on the local network but not for connections from internet, which are forwarded by haproxy. So both types of login can be distinguished by a different inet_listener and also a different by local_name. Is there a way to set auth_mechanisms such the it will impossible to use kerberos via haproxy connections or by filtering on local_name? - Kees.

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