Author: Suresh Ramasubramanian Date: To: Exim Users Mailing List Subject: Re: [Exim] RFC 2821 and "headers_sender_verify"/"headers_checks_fail"
Dave C. rearranged electrons thusly:
> Any automatically-generated mail (especially generated in response to
> receipt of a message, regardless of wether its an nondelivery report or
> anything else) should always use <> as the envelope sender to prevent
> mail-loops (eg, the classic 'dueling autoresponders' situation)
There are other ways to prevent mail loops - such as the addition of an X-Loop
header (or GNU/Mailman's X-Been-There)
Not always the case that autoresponders are sent out with MAIL FROM:<>