McAfee MSA-3400-SWGI Installation Guide - Page 52

Delivery, Email attachments, Retry All, Refresh

Get McAfee MSA-3400-SWGI - Web Security Appliance 3400 PDF manuals and user guides View all McAfee MSA-3400-SWGI manuals
Add to My Manuals
Save this manual to your list of manuals

Page 52 highlights

Troubleshooting FAQ Anti-relay is configured using the domains and networks that the appliance delivers mail for, while the anti-spam configuration blocks a message based on who sent it. Directory Harvest Prevention does not work. For Directory Harvest Prevention to work correctly, your email server must check for valid recipients during the SMTP conversation, and then send a non-delivery report. Several email servers do not send User unknown errors as part of the SMTP configuration. These include (but might not be limited to): • Microsoft Exchange 2000 and 2003 (when using their default configuration). • qmail. • Lotus Domino. Check the user documentation for your email server to see if your email server can be configured to send 550 Recipient address rejected: User unknown reports as part of the SMTP conversation when a message to an unknown recipient is encountered. LDAP integration can provide a workaround for this. See the Messaging and Web Security Appliances 4.5 Product Guide. Delivery This section describes delivery issues. When I select Retry All in the Deferred Mail folder, why are the messages not sent? After selecting Retry All, select Refresh to see the progress that the appliance has made through the list of messages. The appliance works through the messages until each one is sent. If there is still a delivery problem caused by the network or an appliance configuration problem, the message is returned to the Deferred Mail folder. 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. 52 McAfee Email and Web Security Appliance 5.5 Installation Guide

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
Anti-relay is configured using the domains and networks that the appliance delivers mail for,
while the anti-spam configuration blocks a message based on who sent it.
Directory Harvest Prevention does not work.
For Directory Harvest Prevention to work correctly, your email server must check for valid
recipients during the SMTP conversation, and then send a non-delivery report.
Several email servers do not send User unknown errors as part of the SMTP configuration.
These include (but might not be limited to):
•
Microsoft Exchange 2000 and 2003 (when using their default configuration).
•
qmail.
•
Lotus Domino.
Check the user documentation for your email server to see if your email server can be configured
to send 550 Recipient address rejected: User unknown reports as part of the SMTP conversation
when a message to an unknown recipient is encountered.
LDAP integration can provide a workaround for this. See the
Messaging and Web Security
Appliances 4.5 Product Guide
.
Delivery
This section describes delivery issues.
When I select Retry All in the Deferred Mail folder, why are the messages not sent?
After selecting
Retry All
, select
Refresh
to see the progress that the appliance has made
through the list of messages.
The appliance works through the messages until each one is sent. If there is still a delivery
problem caused by the network or an appliance configuration problem, the message is returned
to the Deferred Mail folder.
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.
Troubleshooting
FAQ
McAfee Email and Web Security Appliance 5.5 Installation Guide
52