The appliance automatically retries all the deferred messages after 30 minutes, and periodically
after that.
What can I check if I have problems with mail delivery?
To deliver mail via DNS, ensure that the DNS option is selected in the interface.
If your internal mail server is not receiving inbound mail, check that this mail server is configured
to accept email from the appliance.
In the list of local domains for email delivery, do not specify a wildcard catch-all rule. Instead,
enable the fallback relay, and specify it there.
Email attachments
This section discusses email attachment issues.
The appliance blocks all email when I reduce the number of attachments to block.
This setting is intended to block email messages with huge numbers of attachments, which
waste bandwidth.
Some mail clients (like Outlook Express) store extra information in extra attachments, and even
embed the main body of the message in an attachment.
If this number is set too low, even normal email might be rejected.
EICAR (the test virus) or content that must be blocked is still getting through.
Make sure the appliance is in the mail path. Look at the headers of an email message (in Outlook,
select View | Options | Internet Headers).
If the appliance is in the mail path, you see a header of the form Received: from sender by
server_name via ws_smtp with sender and server_name replaced with the actual sender’s
name and the name of the appliance.
When the appliance detects a virus, I get notification of a content violation.
This problem might be due to a conflict between the HTML template warning page, and a
content-scanning rule.
For example, if you are content-filtering on the word Virus but you have also set up the HTML
template for virus detection to warn you that a virus has been detected, an incoming message
containing a virus triggers the message to be replaced with the message, A virus has been
detected. This replacement message then passes through the content filter which triggers on
the word Virus, and the message is replaced with a content violation instead of a virus
notification.
Mail from some senders is getting through, while others are being blocked.
Check the configuration of your inside and outside networks. Make sure that the list of outside
networks has an asterisk (*) as the last entry. Also, make sure that the list of inside networks
does not have an asterisk.
POP3
This section discusses POP3 issues.
Troubleshooting
FAQ
McAfee Email and Web Security Appliance 5.1 Installation Guide
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