Figure 388 Anti-X > Anti-Spam > General; Table 177 Anti-X > Anti-Spam > General - ZyXEL Communications ZyWALL USG 300 User Manual

Chapter 34 Anti-Spam
Figure 388 Anti-X > Anti-Spam > General
The following table describes the labels in this screen.
Table 177 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
544
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 300 User's Guide