Re: [exim] a large number of domains fronted by Exim are ref…

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Auteur: Oliver Egginger
Datum:  
Aan: exim-users
Onderwerp: Re: [exim] a large number of domains fronted by Exim are refusing bounces...
> The main
> argument here is that a valid reason to reject all <> is for
> mailboxes/domains that don't send mail -- so when your callout fails
> and you reject the message its all good.


Yes, this may be true for the envelope sender callouts (as far as I can
see).
But at the last time we see configurations which have special
return-path-addresses (SPF config and so on). These systems may don't
accept the null-reverse-path for their header senders (i.e. the normal
user mailboxes), cause they never use their normal mail addresses in the
return-path. Thats a very sophisticated mail setup and it breaks our
poor header sender callouts. Just these callouts caught so much spam in
the past.
;-(

- oliver