Re: Now well off-topic - was Re: [Exim] how to configure HEL…

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Author: Suresh Ramasubramanian
Date:  
To: Exim Users Mailing List
Subject: Re: Now well off-topic - was Re: [Exim] how to configure HELO/EHLO and DNS for multi-homed hosts
Greg A. Woods wrote:

> Actually it almost never does. Virtually hosted e-mail domains
> generally use very well configured mail servers. They do this by
> pointing their MX records at these shared servers, and usually the mail
> sent out by users of those domains is relayed via their access
> provider's authorised SMTP relay. Remember there's not necessarily any


Not always... look at a cluster of webservers - their MX is elsewhere,
but they do run qmail-send or something similar, in order to send
outgoing mail (cronjobs, mail from web interfaces ...).

Smarthosting all of them through a central server is not always feasible

Why should you care if forward DNS doesn't match rDNS by the way?

> Seems like some APNIC users have managed to get their reverse DNS
> working just fine, though there are some others who are completely
> brain dead when it comes to configuring reverse DNS.


Configuring rDNS isn't the problem at all. Getting your IP provider to
delegate the in-addr.arpa zone to you? Well, that's often a real
problem - even if you give them the appropriate bind config snippets to
do this.

    srs