Issue with Rspamd learning (IMAPSieve) on Dovecot 2.4.1 (Debian 13)

Hello all,

I’ve been spending the last few hours trying to get a fresh ISPConfig install to handle Rspamd learning (moving emails to Junk), but I’m hitting a wall with Dovecot 2.4.1. It seems this version completely changes the rules, and the old tutorials/templates for dovecot.conf just dosen't work

What I’ve tried:

• Section Errors: I tried adding the standard plugin { ... } block to set the imapsieve paths. Dovecot fails to start with: Fatal: Error in configuration file /etc/dovecot/dovecot.conf: Unknown section name: plugin It seems the global plugin block is no longer recognized in the same way in 2.4.x.
  
  
• New Syntax Failure: I tried the "flat" syntax (e.g., plugin/sieve_plugins), but that also fails with an Unknown setting error. Even worse, it triggers dependency errors regarding the quota plugin: Error: Couldn't load required plugin /usr/lib/dovecot/modules/lib11_imap_quota_plugin.so: Plugin quota must be loaded also (you must set: mail_plugins=$mail_plugins quota)
  
  
• IMAP Conflicts: If I add the sieve plugin to protocol imap (traditional method), Dovecot crashes with an undefined symbol error. It only accepts imap_sieve, but without a working plugin section or flat equivalent, I have no way to define the imapsieve_mailbox parameters and trigger the learning scripts.
  

Code:

# load plugin
plugin/sieve_plugins = sieve_imapsieve
# spam
plugin/imapsieve_mailbox1_name = Junk
plugin/imapsieve_mailbox1_causes = COPY APPEND
plugin/imapsieve_mailbox1_before = file:/var/vmail/rspamd-learn-spam.sieve
# ham
plugin/imapsieve_mailbox2_name = *
plugin/imapsieve_mailbox2_from = Junk
plugin/imapsieve_mailbox2_causes = COPY
plugin/imapsieve_mailbox2_before = file:/var/vmail/rspamd-learn-ham.sieve

the mail service itself is working fine (users can log in, mail is flowing), but Rspamd learning is stuck. Moving messages between folders and Junk does not trigger the rspamc pipe because the configuration for those triggers is rejected by the Dovecot 2.4 parser.

Code:

root@ns1:~# rspamc stat
...
Messages learned: 16
Total learns: 16 <======= (Static - no increase on move to Junk)

Does anyone have a working dovecot.conf example specifically for version 2.4.x? Or at least some info on how to properly define imapsieve_mailbox parameters now that both the old plugin {} block and the flat plugin/ prefix are being rejected?

Thanks for the help!

 

ISPConfig's basically any in-depth spamfilter manual/docs is a damn blackbox- nothing ever works properly, I have a huge list of either:
complete@adress. tld
*@address. tld
@address. tld
in spamfilter whitelist, as we llas the same in postfix whitelist in UI, and I still can't receive emails, this is a damn joke and there's not a single plain document on how to configure the damn thing.