On Wed, 2007-08-08 at 17:08 +0200, Moshe Leibovitch wrote:
> > The problem is that the mail server running the mail domain comany.com
> > doesn't like to receive e-mail from addresses in the form of
> > server.comany.com (where server.company.com is local host name that is
> > not visible on the internet) - because it doesn't accept mail from
> > "domains" that it can't resolve. So mail from <[EMAIL PROTECTED]>
> > to <[EMAIL PROTECTED]> gets rejected.

> > Can any one suggest a better method of getting my log reports ? I
> rather
> > not have an alias for '[EMAIL PROTECTED]' on the mail server - its a
> good
> > address for a spam trap, but probably nothing else.
> > 
> Either define mynetworks to include all local networks thus whitelist
> them or use access list by domain ( with or without wild card ).

I'm assuming your talking about the mail server here ? I rather not mess
with the mail server - lets just assume I don't have control of it - but
in anyway its not local to the network with the private server on it, so
I don't want to white list anything.

> PS Why do try to resolve domains in the first place? If you are
>     resolving to check mx then it's a headache since many ISP's
>     do not conform to standards. I.e. sending  from servers
>     without mx records.

The mail server again ? Lets assume I don't have control of it. But more
to the point - its not checking for MXs. Sending mail or receiving mail
doesn't require an MX. mail to [EMAIL PROTECTED] is valid
even if yada.blabla.something.com does not have an MX record, as long as
the domain itself resolves to an IP address. 

>     If you are checking just for valid domains, i.e. with a valid A
>     records then again, what exactly will this check tell you?
>     Weigh carefully the overhead against the results.

Its a form of enforcing correct behavior, its rather useful against spam
droids and other fake e-mails. I actually can't see how any self
respecting postmaster would use an unresolved name as a the domain in a
>From address.

-- 

Oded


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