Route a domain’s incoming mail to a specific server. For more information, read the documentation.
The system uses the following criteria to detect the email routing settings:
Lowest numbered mail exchanger points to an IP address on this server.
Lowest numbered mail exchanger points to an IP address not on this server.
No mail exchangers point to an IP address on this server.
Note: Automatic detection is not possible if the configured MX records do not resolve.
The server will always accept mail for this domain. The system will deliver mail to the local mailbox.
The server will act as a backup mail exchanger. The system will hold mail for this domain until a lower number mail exchanger is available.
The server will not accept mail for this domain. The system sends all mail for this domain to the lowest numbered mail exchanger.