[BlueOnyx:03603] Re: Mail Bounces sometimes

[Darrell D. Mobley]

> -----Original Message-----
> From: blueonyx-bounces at blueonyx.it [mailto:blueonyx-bounces at blueonyx.it]
> On Behalf Of Michael Stauber
> Sent: Tuesday, February 16, 2010 2:07 AM
> To: BlueOnyx General Mailing List
> Subject: [BlueOnyx:03602] Re: Mail Bounces sometimes
> 
> The righthand side of any A or MX record should point to something that's
> exactly named as the site is named in the GUI.
> 
> If you want mail.company.com, too, and your site is named www.company.com
> in the GUI, then your DNS would look like this:
> 
>  company.com            ---- A Record ---->      <IP-Address>
>  www.company.com         ---- A Record ---->     <IP-Address>
>  mail.company.com         ---- A Record ---->     <IP-Address>
>  company.com            ---- MX Record --->      www.company.com (*)
>  www.company.com         ---- MX Record --->     www.company.com (*)
>  mail.company.com         ---- MX Record --->     www.company.com (*)
>  <IP-Address>           ---- Reverse ---->       company.com (***)

I have been doing it like this:

company.com            ---- A Record ---->      xxx.xxx.xxx.101
www.company.com         ---- A Record ---->     xxx.xxx.xxx.101
mail.company.com         ---- A Record ---->    xxx.xxx.xxx.98
company.com            ---- MX Record --->      mail.company.com
www.company.com         ---- MX Record --->     mail.company.com

Email server aliases for www.company.com: company.com, mail.company.com

Web server aliases for www.company.com: company.com

xxx.xxx.xxx.98 is the primary IP address of the server and has a reverse
pointer set to it, which is why I use it as the mail server record.  

Why did I do it like this?  Because no matter which way I tried to configure
a site, the email server always responded from the server's primary IP
address and not the IP address configured for a site in the GUI.  So I did
it like this to stop the carping that some mail servers had about a given
site's mail server IP not matching what was configured in DNS.

Even if a client has a dedicated IP from me, for their own SSL cert or
something, I still set their mail server IP to be the main xxx.xxx.xxx.98 IP
of the server for the reason stated.  Dedicated IP clients also get a
reverse pointer record, but it doesn't appear to work.