Mail Gateways

This setting specifies names or IP addresses of the email servers for the domain. If no port is specified, the system uses the default port 25.

Each entry must appear on a separate line, in one of the following formats:

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Domain

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Domain: Port

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IP address

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IP Address: Port

When multiple servers are configured, select how the mail is distributed in case of server failure.

 

Option	Description
Failover	Mail is sent the first entered server. If the server is unavailable, mail goes to the second server, and so on.
Random	Mail is evenly distributed between all configured servers.

Boundary Encryption

The options are:

 

Option	Description
Never Encrypt	Transport Layer Security (TLS) is never attempted during the session.
Attempt to Encrypt	If an encryption session cannot be established, the message is sent in the clear.
Always Encrypt (any certificate)	The server accepts any certificate from the gateway.
Always Encrypt (valid certificate)	The server accepts any valid, non-expired, certificate that has the proper form and syntax.
Always Encrypt (trusted certificate)	The server accepts only certificates issued by a trusted Certificate Authority (CA), there exists a complete chain to the CA, and the host name is not an IP address.

Test Connection

Sends an inbound test message from the Email Security productto a mailbox on the domain to validate the boundary encryption settings. Enter a valid mailbox name.