Virus, Virus 55 – Google Message Security Troubleshooting Guide User Manual
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Frequently Asked Questions 55
You will see a list of alias addresses, sorted by organization. This information
is compiled monthly, so recent changes will not be included in this report.
Virus
Why was this virus apparently delivered despite virus
blocking?
1.
Confirm your inbound virus blocking is configured correctly. It is especially
important to confirm the organization’s Non-Account Virus Blocking feature
and the Default User’s Virus Blocking field are enabled. For more information,
see.
2.
Often the user or mailing list receiving the message is not registered in the
email security service. Check the headers of the virus email to determine the
recipient and to see whether the message was sent directly to and was
accepted by your mail server, bypassing the email security service.
a.
Search the message headers for X-pstnvirus header. If this header is
present, the message went to a registered recipient and was filtered for a
virus. For more information, see .
b.
Confirm all of your user addresses and mailing lists are registered with
the email security service. Messages to unregistered users and mailing
lists are delivered unfiltered. For more information, see.
Why does Virus Blocking seem to be blocking legitimate
messages?
Virus Blocking either quarantines or blocks all fragmented messages, since
fragmented messages cannot be properly scanned. Message fragmenting is not
used widely since most mail messages can be sent within the SMTP standard
using the common networking technologies and processing power of today’s
computers.
For more information on Virus Fragment Blocking, see .