[Exim] Unqualified Mail-Followup-To

Hi group,

I'm new to this group and not very good with exim, I'm afraid...

I had some problems with another mailing list since my mutt was not
'subscribed' to it so added a Mail-Followup-To header with my
unqualified address 'dfokkema'. Of course, also the From header was the
unqualified 'dfokkema'. Then, as my message passed through my exim
(3.35) the From header was qualified using my qualified_domain. However,
the Mail-Followup-To header was left unqualified. This led to some
problems at the other end, where the address _was_ qualified and I ended
up with Mail-Followup-To: dfokkema@??? which simply does
not exist.

So, how can I tell exim to also check the Mail-Followup-To header for
unqualified addresses?

TIA,

David