[exim] mail from:<> rejected - RFC-1123 - feature request

ok - coming back to this topic again. Sometimes sender verification
fails because the sending server rejects all mail from:<> as opposed to
accepting mail from:<> and rejecting the tested address. Basically the
server is ignorant of rfc bounce messages.

What I would like to do is to be able to distinguish between the two and
just warn on the rfc-ignorant domains and deny on the trury bed email
addresses.

Does anyone have any ACL code that does this?