In message <Pine.SUN.3.93.970512173453.3557K-100000@sunc>, Richard Gilbert
writes:
> stoat is a host in the same domain as the host on which exim is running,
> i.e. shef.ac.uk, so I would like user@stoat to resolve to
> user@???. I also want user@cam to resolve to user@???.
> If I set qualify_single to false neither of the addresses user@stoat and
> user@cam succeeds. ...
A word of caution here. There is no general solution to the domain
qualification problem, because multi-homing makes it a one-to-many
mapping. When host H exists in domains X and Y then there is no single
"correct" full qualification, not only because H.X and H.Y are both
correct, but even worse, because H may actually be H1 in X and H2 in Y.
And it can get even more complicated: one or more of H1/H2 can exist
in both parent domains at the same time. The general case is murder.
At best one can create site-dependent qualification rules, but since a
general solution is not possible, one should never hardwire any such
qualification policy into software.
Rich.
--
########### Dr. Rich Artym ================ PGP public key available
# galacta # Email : rich@??? 158.152.156.137
# ->demon # Web : http://www.galacta.demon.co.uk - temp page only
# ->ampr # AMPR : rich@g7exm[.uk].ampr.org 44.131.164.1 BBS:GB7MSW
# ->NTS # Fun : Unix, X, TCP/IP, kernel, O-O, C++, SoftEng, Nano
########### More fun: Regional IP Coordinator Hertfordshire + N.London
