[dns-operations] about list's MX

Chris Thompson cet1 at cam.ac.uk
Tue May 27 11:52:26 UTC 2014

On May 26 2014, Frank Denis wrote:

>On May 25, 2014, at 6:25 PM, hua peng <huapeng at arcor.de> wrote:
>> If no MX provided, how will the messages be routed?
>  If no MX records are found, mail exchangers try A records.
>  See section 5 of RFC2821.

Or AAAA records (trumping that with section 5 of RFC 5321). Though
which it should try first will "depend on local circumstances, such
as performance of the relevant networks" ...

Chris Thompson               University of Cambridge Information Services,
Email: cet1 at uis.cam.ac.uk    Roger Needham Building, 7 JJ Thomson Avenue,
Phone: +44 1223 334715       Cambridge CB3 0RB, United Kingdom.

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