MX Record

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@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.

Thanks for the help everyone!!!

MikeHamilton@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@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@mydomain.com, then have mail.mydomain.com forward the message
to rt@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.