But how do I require users to authenticate on smtp?
The only thing you should need to do is enable both types of smtp authentication in the SMTP server settings and, as I mentioned, FusionMail should deny relay except for authenicated users.
I put the original fusionmail templates back in the domains directory, but I can configure my email client here at work to use no authentication at all on smtp, incorrect auth on pop3, and both to: and from: are foreign domains, but the server still delivers successfully. I also got picked up by spam servers again as an open relay, and I had to put the <cfif authenticated neq "yes"> back in to stop them. Did I maybe screw something up in the ims config program?
But smtp auth is not required? If a foreign user sends email to one of my users, doesn't the foreign user's smtp server send directly to my smtp server via a non-authenticated connection? So what is the difference between that versus a spammer using me as a relay?Maybe I am confused as to how smtp/post/relay work together?
The POST server will send any mail that is present in its queue. So, if a mail gets to the POST queue it will be sent.
What you want to do is prevent unauthorized mail from getting there in the first place and that is where SMTP auth comes into play.
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