On 07/22/2011 09:50 AM, Feng He wrote:
Given the MX hosts for sympatico.ca domain:
$ dig sympatico.ca mx +short
5 mxmta.sympatico.ca.
$ dig mxmta.sympatico.ca +short
67.69.240.17
67.69.240.24
67.69.240.22
67.69.240.23
67.69.240.21
67.69.240.20
67.69.240.19
67.69.240.18
when the peer MTA fail to talk to one of these hosts,will it try the
next one? or it just give up?
It should try the next one, but there is a lot of crappy MTA software
out there.
See section 5 of RFC 5321, or earlier RFC 2821, or section 5 of RFC 1123
and earlier RFCs 821 and 974, for details.
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