Our antivirus gateway has continued to function suboptimally. Over the past two days, it has been unable to keep up with the mail load. This is apparently due to the large number of virus-infected messages, and a larger than normal number of arriving messages. As of the time of this entry, we have approximately 75000 messages in queue.
The antivirus gateway has been taken entirely out of the mail flow, so new mail will be delivered in a timely fashion today.
The plan is to remove virus-infected messages with a manual scan, then rebuild the antivirus gateway once the messages in queue have been delivered.