My company (RJR Solutions) just upgraded to virtualmin Pro. They asked me to set up VM GPL on a different server to act as a secondary MX server. I followed the directions here: http://www.virtualmin.com/documentation/email/hold-and-forward
I logged into the secondary server, and did not see anything created in /var/mail
I performed the following test:
telnet xxx.xxx.xxx.xxx 25
Connected to xxx.xxx.xxx.xxx.
Escape character is '^]'.
220 mailrelay.com ESMTP Postfix (Ubuntu)
MAIL FROM: email@example.com
250 2.1.0 Ok
RCPT TO: firstname.lastname@example.org
554 5.7.1 email@example.com: Relay access denied
How do I know that the backup mail relay is working? It appears that it is not.