[rt-users] MX Record

[Jorey Bump]

MikeHamilton at clovisusd.k12.ca.us wrote:

> 
> Ok...I need one more piece of the puzzle here.
> 
> We have our regular old mail servers that handle all of the mail for or 
> organization. I want to use the mail features of RT by using it as a 
> subdomain. If our mail comes into:
> mail.mydomain.com
> and I want to set up:
> rt.mydomain.com
> as our mail server for RT only, do I need to have an MX record in our 
> DNS for that to work? I realize then that the email addresses would then 
> be helpdesk at rt.mydomain.com, but that is fine. I mainly need to know if 
> the MX record is going to be required because I will need to make sure 
> that it does not cause problems with our existing mail.

You do not need to set up an MX record. Mail will be delivered directly 
to that host. Furthermore, you can use addresses like 
helpdesk at mydomain.com, then have mail.mydomain.com forward the message 
to rt at rt.mydomain.com via /etc/aliases, procmail, virtusertable, etc.

Why would you do this? Then you can take advantage of any antivirus or 
antispam features that are already configured on your main mailserver. 
Also, by restricting SMTP connections to mail.mydomain.com, you have one 
less vulnerable service exposed to the Internet on your RT box.