ZyXEL Communications ZyWall USG 2000 User Manual page 578

Chapter 35 Anti-Spam
The following table describes the labels in this screen.
Table 168 Anti-X > Anti-Spam > General
LABEL
General
Settings
Enable Anti-
Spam
Action taken
when mail
sessions
threshold is
reached
Policy
Summary
Priority
From
To
Protocol
578
DESCRIPTION
Click Advanced to display more settings. Click Basic to display fewer
settings.
Select this check box to check SMTP (TCP port 25) and POP3 (TCP port
110) traffic for spam e-mail.
An e-mail session is when an e-mail client and e-mail server (or two e-
mail servers) connect through the ZyWALL. Select how to handle
concurrent e-mail sessions that exceed the maximum number of
concurrent e-mail sessions that the anti-spam feature can handle. See
the chapter of product specifications for the threshold.
Select Forward Session to have the ZyWALL allow the excess e-mail
sessions without any spam filtering.
Select Drop to have the ZyWALL drop mail connections to stop the
excess e-mail sessions. The e-mail client or server will have to re-
attempt to send or receive e-mail later when the number of e-mail
sessions is under the threshold.
This is the position of an anti-spam policy in the list. The ordering of your
anti-spam policies is important as the ZyWALL applies them in sequence.
Once traffic matches an anti-spam policy, the ZyWALL applies that policy
and does not check the traffic against any more policies.
The anti-spam policy has the ZyWALL scan e-mail traffic that is coming
from this zone and going to the To zone.
The anti-spam policy has the ZyWALL scan e-mail traffic that is going to
this zone from the From zone.
These are the protocols of traffic to scan for spam.
SMTP applies to traffic using TCP port 25.
POP3 applies to traffic using TCP port 110.
ZyWALL USG 2000 User's Guide