Hello,
An identical problem happened to us too in November 2022 with zimbra 8.8.15.
The occupied disk space in the main store had increased overnight by about 175 GB .
Checking the logs we found that an outlook client via the imap protocol kept writing the exact same message of about 7.5 MB over and over again, it did it about 25000 times. The strange thing is that the user quota of 5GB was not increased at all, and the zimbraPrefMessageIdDedupingEnabled option (automatically deletes duplicate copies of the same message upon receipt) that account has enabled apparently did not work.
These are some lines from the mailbox.log
2022-11-22 23:59:46,415 INFO [ImapServer-1307] [name=xxxxxx@istat.it;mid=1098;ip=xxxxxx;oip=xxxxxx;via=xxxxxx(nginx/1.20.0);ua=Microsoft Outlook/16.0.5257.1000;cid=4013125;] mailop - Adding Message: id=868455, Message-ID=<bmgDH.0000@8a8025be-6a7b-11ed-8000-9c934ef39eca>, parentId=858294, folderId=2, folderName=Inbox acct=c94d016f-db9d-44cc-b5aa-5f834c1b5f2e.
2022-11-22 23:59:48,765 INFO [ImapServer-1312] [name=xxxxxx@istat.it;mid=1098;ip=xxxxxx;oip=xxxxxx;via=xxxxxx(nginx/1.20.0);ua=Microsoft Outlook/16.0.5257.1000;cid=4013125;] mailop - Adding Message: id=868456, Message-ID=<bmgDH.0000@8a8025be-6a7b-11ed-8000-9c934ef39eca>, parentId=858294, folderId=2, folderName=Inbox acct=c94d016f-db9d-44cc-b5aa-5f834c1b5f2e.
2022-11-22 23:59:51,111 INFO [ImapServer-1307] [name=xxxxxx@istat.it;mid=1098;ip=xxxxxx;oip=xxxxxx;via=xxxxxx(nginx/1.20.0);ua=Microsoft Outlook/16.0.5257.1000;cid=4013125;] mailop - Adding Message: id=868457, Message-ID=<bmgDH.0000@8a8025be-6a7b-11ed-8000-9c934ef39eca>, parentId=858294, folderId=2, folderName=Inbox acct=c94d016f-db9d-44cc-b5aa-5f834c1b5f2e.
2022-11-22 23:59:53,455 INFO [ImapServer-1312] [name=xxxxxx@istat.it;mid=1098;ip=xxxxxx;oip=xxxxxx;via=xxxxxx(nginx/1.20.0);ua=Microsoft Outlook/16.0.5257.1000;cid=4013125;] mailop - Adding Message: id=868458, Message-ID=<bmgDH.0000@8a8025be-6a7b-11ed-8000-9c934ef39eca>, parentId=858294, folderId=2, folderName=Inbox acct=c94d016f-db9d-44cc-b5aa-5f834c1b5f2e.
Fortunately the problem has not recurred.
Since that day we have put in a check that alerts us to any excessive message writing.
Greetings
An identical problem happened to us too in November 2022 with zimbra 8.8.15.
The occupied disk space in the main store had increased overnight by about 175 GB .
Checking the logs we found that an outlook client via the imap protocol kept writing the exact same message of about 7.5 MB over and over again, it did it about 25000 times. The strange thing is that the user quota of 5GB was not increased at all, and the zimbraPrefMessageIdDedupingEnabled option (automatically deletes duplicate copies of the same message upon receipt) that account has enabled apparently did not work.
These are some lines from the mailbox.log
2022-11-22 23:59:46,415 INFO [ImapServer-1307] [name=xxxxxx@istat.it;mid=1098;ip=xxxxxx;oip=xxxxxx;via=xxxxxx(nginx/1.20.0);ua=Microsoft Outlook/16.0.5257.1000;cid=4013125;] mailop - Adding Message: id=868455, Message-ID=<bmgDH.0000@8a8025be-6a7b-11ed-8000-9c934ef39eca>, parentId=858294, folderId=2, folderName=Inbox acct=c94d016f-db9d-44cc-b5aa-5f834c1b5f2e.
2022-11-22 23:59:48,765 INFO [ImapServer-1312] [name=xxxxxx@istat.it;mid=1098;ip=xxxxxx;oip=xxxxxx;via=xxxxxx(nginx/1.20.0);ua=Microsoft Outlook/16.0.5257.1000;cid=4013125;] mailop - Adding Message: id=868456, Message-ID=<bmgDH.0000@8a8025be-6a7b-11ed-8000-9c934ef39eca>, parentId=858294, folderId=2, folderName=Inbox acct=c94d016f-db9d-44cc-b5aa-5f834c1b5f2e.
2022-11-22 23:59:51,111 INFO [ImapServer-1307] [name=xxxxxx@istat.it;mid=1098;ip=xxxxxx;oip=xxxxxx;via=xxxxxx(nginx/1.20.0);ua=Microsoft Outlook/16.0.5257.1000;cid=4013125;] mailop - Adding Message: id=868457, Message-ID=<bmgDH.0000@8a8025be-6a7b-11ed-8000-9c934ef39eca>, parentId=858294, folderId=2, folderName=Inbox acct=c94d016f-db9d-44cc-b5aa-5f834c1b5f2e.
2022-11-22 23:59:53,455 INFO [ImapServer-1312] [name=xxxxxx@istat.it;mid=1098;ip=xxxxxx;oip=xxxxxx;via=xxxxxx(nginx/1.20.0);ua=Microsoft Outlook/16.0.5257.1000;cid=4013125;] mailop - Adding Message: id=868458, Message-ID=<bmgDH.0000@8a8025be-6a7b-11ed-8000-9c934ef39eca>, parentId=858294, folderId=2, folderName=Inbox acct=c94d016f-db9d-44cc-b5aa-5f834c1b5f2e.
Fortunately the problem has not recurred.
Since that day we have put in a check that alerts us to any excessive message writing.
Greetings
Statistics: Posted by Lostaff — Wed Jan 08, 2025 11:49 am