No connection with imap server

A

AlexanderNL

Verified User
Joined
Feb 17, 2025
Messages
37
Sinds the last update of DirectAdmin (DirectAdmin 1.689) problem with e-mail, Update Direct Admin look like succesfull, but i can not connect the imap server.
The client on my phone as Micrsoft Office Outlook can not connect with the imap server. I can not connect with my email with Roundcube of the server. it look like that there is something changed afther the last update.

When i look in: "Mail Queue Administration", there i see the mail what is hanging and not coming to the mailbox

#Linux Version
cat /etc/os-release
NAME="CentOS Stream"
VERSION="8"
ID="centos"
ID_LIKE="rhel fedora"
VERSION_ID="8"
PLATFORM_ID="platform:el8"
PRETTY_NAME="CentOS Stream 8"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:centos:centos:8"
HOME_URL="https://centos.org/"
BUG_REPORT_URL="https://bugzilla.redhat.com/"
REDHAT_SUPPORT_PRODUCT="Red Hat Enterprise Linux 8"
REDHAT_SUPPORT_PRODUCT_VERSION="CentOS Stream"

#Dovecot Version
dovecot --version
2.4.2 (0962ed2104)

#Exim Version
exim --version
Exim version 4.99 #2 built 13-Nov-2025 22:09:21
Copyright (c) University of Cambridge, 1995 - 2018
(c) The Exim Maintainers and contributors in ACKNOWLEDGMENTS file, 2007 - 2025
Hints DB:
Berkeley DB: Berkeley DB 5.3.28: (September 9, 2013)
Support for: Content_Scanning Exim_filter Sieve_filter crypteq iconv() IPv6 Perl move_frozen_messages OpenSSL TLS_resume DANE DKIM DNSSEC ESMTP_Limits ESMTP_Wellknown Event OCSP PIPECONNECT PRDR Queue_Ramp SPF SRS TCP_Fast_Open
Lookups (built-in): lsearch wildlsearch nwildlsearch iplsearch cdb dbm dbmjz dbmnz dnsdb spf
Authenticators (built-in): cram_md5 dovecot plaintext spa
Routers (built-in): accept dnslookup ipliteral manualroute redirect queryprogram
Transports (built-in): appendfile/maildir/mailstore/mbx autoreply lmtp pipe smtp
Malware: f-protd f-prot6d drweb fsecure sophie clamd avast sock cmdline
Fixed never_users: 0
Configure owner: 0:0
Size of off_t: 8
2025-11-14 01:20:07 cwd=/usr/local/directadmin/custombuild 2 args: exim --version
Configuration file is /etc/exim.conf

#Build files
Dovecon
Exim

Oh damn, see that this must be in... General Technical Discussion & Troubleshooting :(
 
Last edited:
Hello,

Thank you for the details of your setup. But it is still not clear, why you can not connect to the IMAP server. And what error do you get? Is dovecot running at all? Is it a timeout error? Or TSL/SSL related one?
 
When I will open with roundcube it's say van not connect with imap. It's a time out out. Dovecon is still running. I use imap on port 993 and smtp on 465

I shall later send the log about the connetion, bur that van be in few hours
 
Last edited:
This looks not good.
Code: 
Got error 'PHP message: PHP Strict Standards:  Non-static method PEAR::setErrorHandling() should not be called statically in /home/homedir/domains/domain/public_html/webmail/program/include/iniset.php on line 122\n'
[Fri Nov 14 02:23:07.668115 2025] [proxy_fcgi:error] [pid 770524:tid 770601] [client 3.138.185.30:60075] AH01071: Got error 'PHP message: PHP Deprecated:  Non-static method PEAR::isError() should not be called statically, assuming $this from incompatible context in /home/homedir/domains/domain/public_html/webmail/program/include/rcube_mdb2.php on line 187\n
 
I have downgrade Exim, but also no changes for now:
Code: 
Exim installation complete
Moving exim binary.
Enabling exim in systemd...
Enabling BlockCracking...
BlockCracking is now enabled.
2025-11-15 02:09:17 cwd=/usr/local/directadmin/custombuild 2 args: /usr/sbin/exim --version
2025-11-15 02:09:17 cwd=/usr/local/directadmin/custombuild 2 args: /usr/sbin/exim --version
Enabling Easy Spam Fighter...
Easy Spam Fighter is now enabled.
Restarting exim.
Exim 4.98.2 Installed.
Restarting exim.
[root@server custombuild]# da build exim_conf
Enabling BlockCracking...
BlockCracking is now enabled.
2025-11-15 02:09:32 cwd=/usr/local/directadmin/custombuild 2 args: /usr/sbin/exim --version
2025-11-15 02:09:32 cwd=/usr/local/directadmin/custombuild 2 args: /usr/sbin/exim --version
Enabling Easy Spam Fighter...
Easy Spam Fighter is now enabled.
Restarting exim.
[root@server custombuild]# da build clean
cleaning up temporary build dir '/usr/local/directadmin/custombuild/tmp'
cleaning up download cache dir '/usr/local/directadmin/custombuild/cache'
removed '/usr/local/directadmin/custombuild/cache/exim-4.98.2.tar.gz'
[root@server custombuild]# da build update
directadmin current 1.689 fea2b404f423f49b2954ac93732b10afe6b5195f is already latest
[root@server custombuild]# da build update_versions
[root@server custombuild]# restart
-bash: restart: command not found
[root@server custombuild]#
 
AlexanderNL said:
/var/log/httpd/domain/domain.webmail.error ?
Click to expand...
Not related again. I was referring to logs from RoundCube, neither PHP nor a webserver.

Once again in order to see what is wrong you need to either check debug logs of an imap session in roundcube or analyse dovecot logs.

Dovecot logs can be found on the server already. They are written by default. In order to enable imap debug in roundcube you will need to adjust roundcube config file. Check documentation on how to do it.

As soon as you get debug details from roundcube you might share them here on the forums.

If it is something beyond your expertise, you might open a ticket with directadmin support or hire someone (including me) for this job.
 
zEitEr said:
Dovecot logs
Click to expand...
Dovecot logs in DA as /var/log/maillog?

Code: 
Nov 15 06:13:12 server dovecot[2555]: imap-login: Error: auth-client: conn unix:login (pid=1504,uid=0): Timeout waiting for handshake from auth server. my pid=45977, input bytes=0
Nov 15 06:13:12 server dovecot[2555]: pop3-login: Error: auth-client: conn unix:login (pid=1504,uid=0): Timeout waiting for handshake from auth server. my pid=44797, input bytes=0
Nov 15 06:13:12 server dovecot[2555]: imap-login: Error: auth-client: conn unix:login (pid=1504,uid=0): Timeout waiting for handshake from auth server. my pid=45978, input bytes=0
Nov 15 06:13:12 server dovecot[1504]: master: Error: service(auth): command startup failed, throttling for 60.000 secs
Nov 15 06:13:12 server dovecot[2555]: auth: Fatal: master: service(auth): child 47397 killed with signal 11 (core dumps disabled - https://dovecot.org/bugreport.html#coredumps)
Nov 15 06:13:25 server dovecot[2555]: imap-login: Warning: Auth process not responding, delayed sending initial response (greeting): user=<>, rip=77.169.25.193, lip=145.239.11.31, TLS, session=<sH3nK5tDQORNqRnB>

In /var/log/dovecot-lmtp-errors.log

Code: 
Nov 12 20:59:19 lmtp(2127143): Error: conn unix:/run/dovecot/anvil (pid=1669821,uid=0): net_connect_unix(/run/dovecot/anvil) failed: Permission denied
Nov 12 20:59:19 lmtp(2127143): Warning: Killed with signal 15 (by pid=1 uid=0 code=kill)
 
Last edited:
AlexanderNL said:
Nov 15 06:13:12 server dovecot[1504]: master: Error: service(auth): command startup failed, throttling for 60.000 secs
Nov 15 06:13:12 server dovecot[2555]: auth: Fatal: master: service(auth): child 47397 killed with signal 11 (core dumps disabled - https://dovecot.org/bugreport.html#coredumps)
Nov 15 06:13:25 server dovecot[2555]: imap-login: Warning: Auth process not responding, delayed sending initial response (greeting): user=<>, rip=77.169.25.193, lip=145.239.11.31, TLS, session=<sH3nK5tDQORNqRnB>[/CODE]
Click to expand...

The logs show core dumps in dovecot. Usually it happens when a service crashes. It is either due to a RAM shortage or libraries. You will need to investigate it deeper. There is no way to troubleshoot crashes and core dumps on the forums.

If you don't know how to debug software crashes, try and downgrade dovecot to a previous version.

P.s. to be sure the lines are related to roundcube, a debug from IMAP session of roundcube might still be required.
 
zEitEr said:
If you don't know how to debug software crashes, try and downgrade dovecot to a previous version.
Click to expand...
Exim is already downgrade, with last update i think, but how can i downgrade Dovecot?

zEitEr said:
P.s. to be sure the lines are related to roundcube, a debug from IMAP session of roundcube might still be required.
Click to expand...
I think its more related to imap? because outlook is also not working
 
AlexanderNL said:
But what is there different between the versions, that the last update is not working?
Click to expand...

You can find a changelog on the official site of dovecot. I didn't get any other report from either customers of mine or other users on the forums. Probably directadmin developers have some in their tickets system.

If you want me to answer your question in details I will need to connect to your server and investigate the issue on my own.
 
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