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Cisco Cisco Email Security Appliance C160 Mode D'Emploi

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User Guide for AsyncOS 10.0 for Cisco Email Security Appliances
 
Chapter 7      Defining Which Hosts Are Allowed to Connect Using the Host Access Table (HAT)
  Verifying Senders
Note
If you have configured your appliance to use a default domain or to specifically allow partial 
domains when sending or receiving email or if you have enabled address parsing (see the 
“Configuring the Gateway to Receive Email” chapter) you may not be able to create, send, and 
receive an email with a missing or malformed domain.
Step 3
Verify that the message is rejected.
Note that the SMTP code and response is the one you configured for the envelope sender verification 
settings for the THROTTLED mail flow policy.
Sending a Message from an Address That is Excluded from Sender Verification Rules
To confirm that mail from the email address listed in the sender verification exception table is not subject 
to envelope sender verification:
Procedure 
Step 1
Add the following address to the exception table with an “Allow” behavior: 
admin@zzzaaazzz.com
Step 2
Commit your changes.
Step 3
Open a Telnet session to your appliance.
Step 4
Use SMTP commands to send a test message from the email address you entered in the sender 
verification exception table (admin@zzzaaazzz.com).
Step 5
Verify that the message is accepted.
# telnet IP_address_of_Email_Security_Appliance port
220 hostname ESMTP
helo example.com
250 hostname
mail from: admin
553 #5.5.4 Domain required for sender address
# telnet IP_address_of_Email_Security_Appliance port
220 hostname ESMTP
helo example.com
250 hostname
mail from: admin@zzzaaazzz.com
250 sender <admin@zzzaaazzz.com> ok