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formerr
2015 Feb 15
0
Centos 6 Sendmail backup MX Config
...ts of origin.
Yes we do get rejects for real correspondents. A notable recent
victim, if such is the right word to describe a self-inflicted injury,
was ibm.com. Who, in contravention of rfcs 7208 and 7372, both
configured eleven MX hosts for their domain AND enabled SPF. This
causes an immediate permerr with anyone checking SPF as the maximum
number of MX hosts allowed with an SPF enabled domain is ten.
But, who am I to tell IBM how to configure a computer?
On the other hand, we also have large organizations who use smtp pools
and with these grey-listing simply does not work. Each subsequent
at...