Sometime on Aug 30, dodobh@nettaxi.com assembled some asciibets to say:
error reporting is to specify a null reverse-path in the MAIL command of a notification message. When such a message is relayed it is permissible to leave the reverse-path null. A MAIL command with a null reverse-path appears as follows:
MAIL FROM:<>
But this still allows spammers to send anonymous mails. What's the RFC compliant solution?
Philip