User Guide

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AsyncOS 9.1.2 for Cisco Email Security Appliances User Guide
Chapter 24 Configuring Routing and Delivery Features
Controlling Email Delivery Using Destination Controls
The following example shows a configuration file for the domains example1.com and example2.com
along with the default Destination Control entry:
table_tls Specifies the TLS setting for the domain. See Enabling
TLS and Certificate Verification on Delivery, page 23-10
for more information.
Enter one of the following values:
• 0 (or off)
• 1 (or on) for “Preferred”
• 2 (or required) for “Required”
• 3 (or on_verify) for “Preferred (Verify)”
• 4 (or require_verify) for “Required (Verify)”
Strings are not case sensitive.
bounce_profile Name of the bounce profile to use. This cannot be used in
the
[DEFAULT] destination control entry.
send_tls_req_alert Whether to send an alert if the required TLS connection
fails.
Enter one of the following values:
• 0 (or off)
• 1 (or on)
This is a global setting and can only be used in the
[DEFAULT] destination control entry.
certificate Certificate used for outgoing TLS connections. This is a
global setting and can only be used in the
[DEFAULT]
destination control entry.
Note If you do not specify a certificate, AsyncOS
assigns the demonstration certificate, but using the
demonstration certificate is not secure and not
recommended for general use.
Table 24-9 Destination Control Configuration File Parameters
Parameter Name Description
[DEFAULT]
ip_sort_pref = PREFER_V6
max_host_concurrency = 500
max_messages_per_connection = 50
recipient_minutes = 60
recipient_limit = 300
limit_type = host