>>>>> "BLH" == Brian L Heess <email@example.com> writes:
BLH> Hmmm...are you sure? (only cuz I am not.. :)
I've sen it perhaps a few hundred times and I've even done it to myself.
If a host is marked as an MX for any host and sendmail isn't told about it,
you will get that error.
Anyway, get do_mx from ftp.hpc.uh.edu:/pub/majordomo and have fun. You'll
need something to to the DNS for you; the script is set up to use "host"
which comes with bind and which everyone should get anyway. Change
$LOOKUP_COMMAND to suit. This is not security tested. (It calls system
with the extracted domain.)
This uses the prototype address validator form 2.0; I didn't have time to
backport the current code but it should work fine form all but the weirdest
cases. You also get syntax checking for your addresses as a bonus.