[exim] Real letters to domain literal?

> From: W B Hacker

> postmaster@, hostmaster@, abuse@ where '@' may be followed with either:
>
> - one of the hosted <domain>.<tld>
> or
> - one of the server's IP's as a literal

Has somebody here ever got a non-spam letter with useful content to
postmaster@[XXX.XXX.XXX.XXX] or abuse@[XXX.XXX.XXX.XXX] ?