Re: [exim] Let the 'postmaster' callout option be damned

* Philip Hazel:

> On a matter of technical detail: I don't think it should be a global
> option (in the Exim 3 style). It should, if implemented, be another
> sub-option of the "callout" option in the ACL.
>

>    verify = sender/callout,postmaster,postmaster_sender=xxxx

This is a bit dangerous because it can easily result in loops. The
empty sender avoids this problem.