Am 12.09.2011 20:31, schrieb Andreas Freyvogel: > I have a bit of an odd problem and hoped you might be able to offer some > assistance or point me in the right direction. > > Yesterday, my server was unable to send emails to 3M (u...@mmm.com). > > The logs shows: > "status=deferred (delivery temporarily suspended: connect to > mmm.com[192.28.34.26]" > > When I did a lookup of mmm.com it resolves to 192.28.34.26, however, the MX > record for 3M shows: > > Authoritative answers can be found from: > mmm.com nameserver = pigseye.mmm.com. > mmm.com nameserver = ns.3m.com. > 3m.com.inbound15.mxlogic.net internet address = 208.65.144.12 > 3m.com.inbound15.mxlogic.net internet address = 208.65.144.13 > 3m.com.inbound15.mxlogic.net internet address = 208.65.145.12 > 3m.com.inbound15.mxlogic.net internet address = 208.65.145.13 > 3m.com.inbound15.mxlogicmx.net internet address = 208.65.144.13 > 3m.com.inbound15.mxlogicmx.net internet address = 208.65.145.12 > 3m.com.inbound15.mxlogicmx.net internet address = 208.65.144.12 > << > > Does anyone know why/how Postfix would be getting the response of > 192.28.34.26 instead of one of the above mail server IP addresses? Is this > on part of my server or to do with the DNS configuration of 3M? > > The fix I have in place was to put "208.65.144.12 mmm.com" in my /etc/hosts > file.
i guess this was a temporary dns-problem where postfix did a fall back to the a-record ;; ANSWER SECTION: mmm.com. 86400 IN A 192.28.34.26 should normally not be a problem because "deferred" means it would try again later
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