Understanding Anti-virus Entries in the Mail Queue

An anti-virus entry type has been added to the queue file for SMTP32. This entry line helps to identify the status of the virus scan for a particular message. The line will have a V in the first column, followed by a 1 or a 0. The following chart displays the possible queue entries regarding the anti-virus.

V1	Message has already been scanned.
V0	Message needs to be scanned.
No entry	Message needs to be scanned.

List Server Interaction

Since IMail Anti-virus scans all incoming and outgoing mail messages, special provisions apply concerning the list server. Normally, IMail Anti-virus would unnecessarily scan a list server message twice, once when the message comes in, and another time when the list server sends the message to the list. This would slow down the processing time.

Therefore, all messages destined for a list are marked as scanned (V1) before they are handed over to the list server. If you look in the queue at a list server message, it will always be labeled V1 (see chart above), no matter what stage the message is in. This tells IMail Server to skip the second scan since the file cannot be infected.