Are you sure about this?
My tests show a 4xx error being issued which should generally cause the
sending mail server to queue the message.
I did test through a relay server though (the relay server queued the
message just fine when the firewall couldn't reach the backend mail server).
Overall the AS/AV works quite well in our experience.
Jack Daniel wrote:
One issue to be aware of with Mail Sentinel (not directly related to
anti-spam and a/v, but significant) is the behavior of the mail proxy when
the mail server is down. The mail proxy bounces mail with a "not a mail
server" type message instead of a "not responding" message. As a result, if
you have a store-and-forward solution in place the recovery server probably
will not queue mail, it will just bounce everything as undeliverable.
Jack Daniel, CISSP
Systems Administrator
South Shore Imported Cars www.sscars.com
Mass Buying Power www.massbuy.com
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