Domino 12.0.2 introduces ICAP. While it has been tested with TrendMicro and McAfee only at the moment, there are other AV solutions available that could be used with this new feature.
While evaluation ClamAV with c-icap, I found that The return codes from c-icap cause an error in MailScan.
The problem is that c-icap returns i.e "HTTP/1.0 403 Forbidden". That is the expected code that will be returned when a virus has been found. There seems nothing wrong at first sight.
BUT: MailScan runs into an error because it expects "HTTP/1.1 403 Forbidden". Spot the difference?
It would make sense to make this configurable in the MailScan configuration. The same applies for other return codes. ( 200, 204, 206 ... )
Leave it at HTTP/1.1 as the default, but let us override the protocol/version if needed.