Q: double cname reference and resulting mx
DougB at dougbarton.net
Sat Jan 11 22:30:07 UTC 2003
rgvt at gmx.net wrote:
> following scenario:
> s3.dom.com -(cname)-> s2.dom.com -(cname)-> s1.dom.com
> s2 & s3 do not have an associated mx. only s1 has an mx.
> what is the correct behaviour when sending mail to s3?
> - the mx of s1 will be used and mail will be delivered
> - or mail will not come through
Either of those are possible. You should never chain CNAME's just on
general principles, and if you want mail delivered to a host you're
always better off making it an A record with its own MX.
It doesn't really matter who is "right" in this argument of yours. The
fact is, if mail isn't getting delivered you need to do what it takes to
make it work.
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