When you use procmail/formail for auto-responding/forwarding/filtering etc.
you can do additional checking on "X-Loop:" header in addition to others to
avoid mail loops.
shirish
Atul Chitnis wrote:
> > > X-Loop: [EMAIL PROTECTED] <--------- Whats this ?
> >
> > Hmmmm.
>
> X-Loop is a common way of ensuring that you don't have mail-loop
> explosions (which, on a Richter scale of 1-10, usually get rated as a
> 5972031 or higher ;-)
>
> Basically, once Majordomo sends out a message, it tags this header onto
> the message. If, for some reason, the message gets fed back to majordomo,
> it can recognise from this header that it has already seen and sent this
> message, and hence it will not feed it back into the list stream (which
> would cause a loop).
>
> Atul
>
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