Use this command to provide a backup destination server in case the first configured mail server is unavailable. This command is not intended to be used for load distribution.
You can configure up to ten different destination mail servers using this command. If you configure more than one destination mail server, the router attempts to contact the first mail server configured. If that mail server is unavailable, it contacts the next configured destination mail server.
I have a customer who has two businesses (with separate mail servers and PRIs) on the same router(gateway). Of course, they would like their free T.37 to work for both businesses, but it only forwards SMTP messages to the first one as long as its available. The MMOIP dial-peers do not direct the TIFF files to the appropriate SMTP server based on the email address.
thanks for your input, relevant responses will be rated.