We have discovered that Kaspersky changed the antivirus engine and does not respect the old engine when pushing new updates to IceWarp Server.
This may lead to conflicts between the update data and the old engine which can cause the SMTP module to stop processing messages.
This problem may affect IceWarp Server for Windows 10.3.x and older (there are separate patches for different verions bellow). Version 10.4.0 and higher do not have this problem.
This problem affects all versions of IceWarp Server for Linux.
Workaround
1. Download the new antivirus engine from the link below.
2. Stop the SMTP module
3. Delete the Kaspersky folder in the IceWarp Server install folder and replace it with this new one.
4. Start the SMTP module.
5. Go to the IceWarp Administration console - Antivirus - General and click update now.
Once the new update is applied your system will function normally again. We apologize for any inconvenience this might have caused you.
Windows
10.0.8
http://www.icewarp.com/download/patches/kaspersky/kaspersky_10.0.8.ZIP
10.1.1-10.2.2
http://www.icewarp.com/download/patches/kaspersky/kaspersky_10.1.1_10.2.2.ZIP
10.3.0
http://www.icewarp.com/download/patches/kaspersky/kaspersky_10.3.0.ZIP
10.3.1-10.3.2
http://www.icewarp.com/download/patches/kaspersky/kaspersky_10.3.1_10.3.2.ZIP
10.3.3-10.3.5
http://www.icewarp.com/download/patches/kaspersky/kaspersky_10.3.3_10.3.5.ZIP
Linux (all distributions)
http://www.icewarp.com/download/patches/kaspersky/kaspersky.tar.gz
NOTE: If IceWarp Server for Linux is not installed in default folder /opt/icewarp/ it is also necessary to change all six paths specified in file kavehost.xml to valid ones.