[CentOS] Re: DKIM

Thu Sep 25 18:17:53 UTC 2008
Les Mikesell <lesmikesell at gmail.com>

Ralph Angenendt wrote:
>> Your problem - if you actually want to solve it instead of tossing the
>> blame to others like yahoo is...
>> # host mail.creativeprogramdesigners.com
>> mail.creativeprogramdesigners.com has address
>> # host
>> domain name pointer
>> creativeprogramdesigners.com.
>> the forward doesn't match the reverse - it's that simple. Why not just
>> fix it?
> Because it is *NOT* needed. I have several machines which have lots of
> A records for just one ip address. But only one name when I do a reverse
> lookup. Anyone checking for that shouldn't be allowed to receive mail. 

Mail isn't supposed to be rejected for this, but some places probably 
do.  A more correct approach is to have one name with the A record and 
the matching ptr and make all of the other names CNAMEs.

   Les Mikesell
     lesmikesell at gmail.com