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Re: the "implicit MX" rule

2004-06-21 08:22:17
Meng Weng Wong wrote:

2) if the domain does NOT have an MX record,
   but it does have an A record,
   and if the domain does not have an SPF record,
   then assume the default SPF record "v=spf1 a -all".

I have tested this rule for some time, and had to remove it again because it
filters legitimate mail.

For example there is mail from from 209.119.0.163 (=plantain.ease.lsoft.com)
with the envelope sender owner-dostravel(_at_)LISTS(_dot_)STATE(_dot_)GOV(_dot_)
LISTS.STATE.GOV has no SPF record and no MX record but an A record
(209.119.0.61) and you can send mail to 
owner-dostravel(_at_)LISTS(_dot_)STATE(_dot_)GOV(_dot_)
But "v=spf1 a -all" incorrectly returns 'fail'.

Roger


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