[dns-operations] about list's MX

SM sm at resistor.net
Mon May 26 07:02:13 UTC 2014

Hi Hua,
At 18:25 25-05-2014, hua peng wrote:
>I think I am totally confused. The lists I subscribed to seem have no MX
>records? For example,
>$ dig lists.openstack.org mx
># got nothing
>$ dig lists.dns-oarc.net mx
># got a CNAME
>If no MX provided, how will the messages be routed?

   "The lookup first attempts to locate an MX record associated with the
    name.  If a CNAME record is found, the resulting name is processed as
    if it were the initial name."

   "If an empty list of MXs is returned, the address is treated as if it
    was associated with an implicit MX RR, with a preference of 0,
    pointing to that host."


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