RFC 974 - Mail Routing and the Domain System

Mon Sep 14 10:34:31 UTC 1998

Hello,

'Just want to clarify something... is there a difference between:

domain.com. MX 10 mx1.domain.com.
domain.com. MX 10 mx2.domain.com.
domain.com. MX 10 mx3.domain.com.
;...
mx1.domain.com. IN A 10.0.0.1
mx2.domain.com. IN A 10.0.0.2
mx3.domain.com. IN A 10.0.0.3

and:

domain.com. MX 10 mx.domain.com.
;...
mx.domain.com. IN A 10.0.0.1
mx.domain.com. IN A 10.0.0.2
mx.domain.com. IN A 10.0.0.3

>From RFC 974:

"...Note that multiple MXs may have the same preference value.  In
this case, all MXs at with a given value must be tried before any of a
higher value are tried..."

Is the behaviour the same with the round-robined configuration?

Thanks in advance,
Mike
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