User Guide

7-16
AsyncOS 9.1.2 for Cisco Email Security Appliances User Guide
Chapter 7 Defining Which Hosts Are Allowed to Connect Using the Host Access Table (HAT)
Handling Messages from a Group of Senders in the Same Manner
Maximum recipients per
message
That maximum number of recipients per message that will be accepted
from this host.
SMTP Banner
Custom SMTP Banner Code The SMTP code returned when a connection is established with this
listener.
Custom SMTP Banner Text The SMTP banner text returned when a connection is established with
this listener.
Note You can use some variables in this field. For more information,
see HAT Variable Syntax, page 7-9.
Custom SMTP Reject Banner
Code
The SMTP code returned when a connection is rejected by this listener.
Custom SMTP Reject Banner
Text
The SMTP banner text returned when a connection is rejected by this
listener.
Override SMTP Banner Host
Name
By default, the appliance will include the hostname associated with the
interface of the listener when displaying the SMTP banner to remote
hosts (for example:
220-hostname ESMTP). You may choose to override
this banner by entering a different hostname here. Additionally, you
may leave the hostname field blank to choose not to display a hostname
in the banner.
Rate Limit for Hosts
Max. Recipients per Hour The maximum number of recipients per hour this listener will receive
from a remote host. The number of recipients per sender IP address is
tracked globally. Each listener tracks its own rate limiting threshold;
however, because all listeners validate against a single counter, it is
more likely that the rate limit will be exceeded if the same IP address
(sender) is connecting to multiple listeners.
Note You can use some variables in this field. For more information,
see HAT Variable Syntax, page 7-9.
Max. Recipients per Hour
Code
The SMTP code returned when a host exceeds the maximum number of
recipients per hour defined for this listener.
Max. Recipients Per Hour
Exceeded Text
The SMTP banner text returned when a host exceeds the maximum
number of recipients per hour defined for this listener.
Rate Limit for Sender
Table 7-8 Mail Flow Policy Parameters (continued)
Parameter Description