Hi Arnt,
At 23:48 25-11-2005, Arnt Gulbrandsen wrote:
I agree with Ned: Don't fall back to A unless you know there's no MX.
According to the RFC, you should fall back to A if there is no
MX. There is no reliable way to tell that there should be a MX and
we should not fall back.
Regards,
-sm