Re: Help! Smtp authentication?

[Thomas Mueller]

Ricsi> Your SMTP agent (yeah ... that one which you can telnet in ;) will get
  incoming mail.
  If it uses ORBS, than it looks up the address.
  If the mail came from a open relay, it will send the mail back, and tell
  the author, that his SMTP server is blacklisted at ORBS.
  'Please contact your postamster, and tell him to fix it' ;)

Ricsi, I think you slipped here.  SMTP handles outgoing mail, POP3 handles
incoming mail.