Open Relay Testing
What is the best method of testing mail servers to determine if they are
susceptible to being exploited as an open relay? We have several mail
servers that I want to verify are "secured". Also, I have been having
problems with sending mail, specifically to AOL users, through my Zoom
Internet account at home. I'm not entirely sure I believe Zoom when they say
that their systems are not open relays. Plus I am considering configuring a
"relay MTA" on my home Debian box to route all of my outgoing mail through
our own office mail servers. Are there any HOWTO's describing ways of
creating a secure relay channel between remote MTA's?
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