Cisco Cisco Email Security Appliance C190 Guía Del Usuario
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User Guide for AsyncOS 10.0 for Cisco Email Security Appliances
Chapter 41 Testing and Troubleshooting
Troubleshooting Email Delivery From the Appliance
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You can use the
tlsverify
command to establish an outbound TLS connection on demand and
debug any TLS connection issues concerning a destination domain. To create the connection,
specify the domain to verify against and the destination host. AsyncOS checks the TLS connection
based on the Required (Verify) TLS setting.
specify the domain to verify against and the destination host. AsyncOS checks the TLS connection
based on the Required (Verify) TLS setting.
Enter the remote hostname or IP.
[]> problemdomain.net
Enter the remote port.
[25]> 25
mail3.example.com> tlsverify
Enter the TLS domain to verify against:
[]> example.com
Enter the destination host to connect to. Append the port (example.com:26) if you are
not connecting on port 25:
[example.com]> mxe.example.com:25
Connecting to 1.1.1.1 on port 25.
Connected to 1.1.1.1 from interface 10.10.10.10.
Checking TLS connection.
TLS connection established: protocol TLSv1, cipher RC4-SHA.
Verifying peer certificate.
Verifying certificate common name mxe.example.com.
TLS certificate match mxe.example.com
TLS certificate verified.
TLS connection to 1.1.1.1 succeeded.