Cisco Cisco Email Security Appliance C190 Guía Del Usuario
4-9
Cisco IronPort AsyncOS 7.5 for Email Advanced Configuration Guide
OL-25137-01
Chapter 4 Validating Recipients Using an SMTP Server
Table 4-2
SMTP Call-Ahead Server Profile Advanced Settings
Setting
Description
Interface
The interface used to initiate the SMTP conversation with
the SMTP server.
the SMTP server.
Choose to use the Management interface or Auto. When
you select Auto, the Email Security appliance attempts to
automatically detect an interface to use. The Cisco IronPort
interface attempts to connect to the SMTP server in the
following ways:
you select Auto, the Email Security appliance attempts to
automatically detect an interface to use. The Cisco IronPort
interface attempts to connect to the SMTP server in the
following ways:
•
If the call-ahead server is on the same subnet as one of
the configured interfaces, then the connection is
initiated by the matching interface.
the configured interfaces, then the connection is
initiated by the matching interface.
•
Any configured SMTP routes are used to route the
query.
query.
•
Otherwise, the interface that is on the same subnet as
the default gateway are used.
the default gateway are used.
MAIL FROM Address
The MAIL FROM: address to be used for the SMTP
conversation with the SMTP server.
conversation with the SMTP server.
Validation Request
Timeout
Timeout
The number of seconds to wait for a result from the SMTP
server. This timeout value is for a single recipient
validation request which may involve contacting multiple
call-ahead servers. See
server. This timeout value is for a single recipient
validation request which may involve contacting multiple
call-ahead servers. See
.
Validation Failure
Action
Action
The action to be taken when a recipient validation request
fails (due to a timeout, server failure, network issue, or
unknown response). You can configure how you want the
Email Security appliance to handle the different responses.
See
fails (due to a timeout, server failure, network issue, or
unknown response). You can configure how you want the
Email Security appliance to handle the different responses.
See
.
Temporary Failure
Action
Action
The action to be taken when a recipient validation request
temporarily fails (and a 4xx response is returned from the
remote SMTP server). This can occur when the mailbox is
full, the mailbox is not available, or the service is not
available).
temporarily fails (and a 4xx response is returned from the
remote SMTP server). This can occur when the mailbox is
full, the mailbox is not available, or the service is not
available).
See
.