Re: [tlug] (OT) Reverse DNS resolution blues- ISP recommendations?

[Curt Sampson <cjs@??>]

On Thu, 1 Mar 2007, Godwin Stewart wrote:

> On Thu, 1 Mar 2007 22:38:37 +0900 (JST), Curt Sampson
> <cjs@??> wrote:
>
> > That's very odd, since you resolve just fine:
>
> But to a generic-looking PTR RR, which is reason enough for more and
> more networks to reject mail from that IP address.

Well, that's pretty bogus if that's indeed what's happening, but on the
other hand, there's not much you can do about it for those cases except
conform to what they want.

But you may want to check that this is really your problem. I've not had an
issue with this, and the two servers I usually send mail from resolve as:

$ host 58.81.178.245
245.178.81.58.in-addr.arpa domain name pointer 58x81x178x245.ap58.ftth.ucom.ne.jp.
$ host 125.100.126.202 
202.126.100.125.in-addr.arpa domain name pointer 125x100x126x202.ap125.ftth.ucom.ne.jp.

It could well be that instead you've got an address on a "this is DSL"
list, or something like that, in which case "fixing" the in-addr.arpa
won't help.

It would be interesting to see what specific rejection messages you're
getting with the 550s back from servers blocking your mail.

cjs
--
Curt Sampson       <cjs@??>        +81 90 7737 2974