In <EB3FF3D8-B5E5-11D8-88FE-000A95B3BA44(_at_)hxr(_dot_)us> Andrew Newton
<andy(_at_)hxr(_dot_)us> writes:
So he had an interesting idea. He suggested that instead of looking
for the MARID record in the domain of the sender, look for it at the
MX target of the sender. This solves his problem since his DNS zone
is the MX target. This also leads to a solution to the wildcard issue.
So, example.com has MX records:
example.com MX 1 foo.com
example.com MX 1 bar.com
Now, are you suggesting that the MARID record would have to be placed
in *both* foo.com and bar.com? What if they conflict? What about
mail servers out there that depend on the falling back to A records
and have no MX records?
-wayne