We are facing the problem that filters created in the web interface do not work reliably.
The issue is particularly noticeable in that emails are not fully processed by the filter.
When an email arrives, the filter should:
-
mark it as read
-
move it to a folder
-
forward it to another address
The first points work, but unfortunately the last one does not always work.
It happens that the mailbox log shows that the email should be forwarded, but it never reaches the MTA and is therefore not delivered.
The following can be seen in the mailbox log (anonymized):
2026-01-08 11:28:47,750 INFO [qtp348026124-2947927] [name=mail@example.com;mid=32;ip=1.2.3.4;oip=1.2.3.4;oproto=https;port=53192;ua=CarbonioWebClient - Firefox 146.0 (Windows) removed link carbonio 202512 FOSS;soapId=4f943131;] filter - Applying filter rules to 36 existing messages.
2026-01-08 11:28:47,828 INFO [qtp348026124-2947927] [name=mail@example.com;mid=32;ip=1.2.3.4;oip=1.2.3.4;oproto=https;port=53192;ua=CarbonioWebClient - Firefox 146.0 (Windows) removed link carbonio 202512 FOSS;soapId=4f943131;] filter - Copying existing message 326745 to folder Unternehmen/Lieferanten allgemein.
2026-01-08 11:28:47,856 INFO [qtp348026124-2947927] [name=mail@example.com;mid=32;ip=1.2.3.4;oip=1.2.3.4;oproto=https;port=53192;ua=CarbonioWebClient - Firefox 146.0 (Windows) removed link carbonio 202512 FOSS;soapId=4f943131;] filter - Deleting original message 326745 after filing to another folder.
2026-01-08 11:31:17,026 INFO [qtp348026124-2931139] [name=mail@example.com;mid=32;ip=1.2.3.4;oip=1.2.3.4;oproto=https;port=41610;ua=CarbonioWebClient - Firefox 146.0 (Windows) removed link carbonio 202512 FOSS;soapId=4f94576d;] filter - Applying filter rules to 35 existing messages.
2026-01-08 11:31:17,064 INFO [qtp348026124-2931139] [name=mail@example.com;mid=32;ip=1.2.3.4;oip=1.2.3.4;oproto=https;port=41610;ua=CarbonioWebClient - Firefox 146.0 (Windows) removed link carbonio 202512 FOSS;soapId=4f94576d;] filter - Copying existing message 326731 to folder Unternehmen/Lieferanten allgemein.
2026-01-08 11:31:17,098 INFO [qtp348026124-2931139] [name=mail@example.com;mid=32;ip=1.2.3.4;oip=1.2.3.4;oproto=https;port=41610;ua=CarbonioWebClient - Firefox 146.0 (Windows) removed link carbonio 202512 FOSS;soapId=4f94576d;] filter - Redirecting message to test@example.com.
2026-01-08 11:31:17,098 INFO [qtp348026124-2931139] [name=mail@example.com;mid=32;ip=1.2.3.4;oip=1.2.3.4;oproto=https;port=41610;ua=CarbonioWebClient - Firefox 146.0 (Windows) removed link carbonio 202512 FOSS;soapId=4f94576d;] filter - Deleting original message 326731 after filing to another folder.
Has anyone else experienced this problem before?
Thanks in advance!
Server: Carbonio 25.12
