[Discuss] E-mail Server Help?

[dsr at randomstring.org (Dan Ritter)]

Kent Borg wrote: 
> I'm getting a complaint from AT&T saying I don't have reverse DNS set up
> correctly.
> 
> > host ff-ip4-mx-vip2.prodigy.net[144.160.159.22]
> > said: 550 5.7.1 Connections not accepted from servers without a valid
> > sender domain.flph839 Fix reverse DNS for 64.105.205.123 (in reply to MAIL
> > FROM command)
> 
> Looks to me like I do. Anyone know what they are complaining about?
> 

dig -t mx borg.org
 ...
    borg.org.       600 IN  MX  10 mail2.borg.org.
borg.org.       600 IN  MX  0 mail.borg.org.
...
mail.borg.org.      3600    IN  A   64.105.205.123


dig -t a mail2.borg.org
...
    mail2.borg.org.     600 IN  CNAME   la.borg.org.
la.borg.org.        3600    IN  A   66.134.52.5


 dig -x 64.105.205.123
...
 123.205.105.64.in-addr.arpa. 38400 IN  PTR mail.borg.org.

dig -x 66.134.52.5
...
 5.52.134.66.in-addr.arpa. 38400    IN  PTR la.borg.org

these all look fine. Maybe you're sending something odd
in MAIL FROM?

-dsr-