Re: Exim4 setup for LAMP web site.

[Camaleón <noelamac@gmail.com>]

On Thu, 23 Sep 2010 13:35:03 -0700, Gary Roach wrote:

> Well, you were correct about the authentication being a problem. I fixed
> it but still no joy. I ran the swaks testing program with: swaks --auth
> --to *me*@verizon.net --server outgoing.verizon.net. This asked for the
> usual login and returned a long list of things. The last lines were:
> 
> <-  235 2.7.0 LOGIN authentication successful.
>   -> MAIL FROM:<root@*mycomputer*.domain>
> <** 550 5.1.8 invalid/host-not-in-DNS return address not allowed
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(...)

That means your ISP is rejecting your host name ("@mycomputer.domain") so 
you should "masquerade" it for outgoing mail. It's like Verizon is making 
some sort of sender validation test, tries to resolve your local domain 
and it fails.

> I understand that my ISP is trying to validate me as a source but am not
> sure what to do to fix it.

Yep, I think so. And that setting should be tweakeable in your exim4 
config file but Exim... mmm, is not my area, dunno how could be done. 
Let's see if someone here can give you any tip :-)

Greetings,

-- 
Camaleón