Hi all -
Not sure if my title correctly says what I'm trying to do, so, let me explain.
Let's say our domain is example.com. Our e-mail addresses use example.com (i.e., [email protected]) and we run our own DNS (running BIND 8.1.2, yes, I know it's old!) server on-site for example.com. We are covered by Postini for spam, viruses, etc... So, the MX records for example.com in our DNS server point to Postini (see below):
We have recently started using a new Help Desk software for tracking requests, problems, etc... It is web-based (URL is help.example.com) and allows for tickets to be submitted via e-mail. It uses postfix for the mail agent and just uses aliases for the e-mail addresses. Examples of e-mail addresses for this system are: [email protected], [email protected] and [email protected].
Since these e-mail addresses have come on-line, our tracking software is now getting spam in it, in the form of tickets! I'm assuming this is because these e-mail addresses are @help.example.com and not example.com; so, not covered by Postini.
So...I've gone to Postini and have setup a sub-domain of help.example.com. Setting up the sub-domain in DNS is where I've gotten stuck. I've copied the four MX records above (gave them 5, 6, 7 and 8 for their priority) and tacked help. to the beginning. Doing an MX test from Postini shows that example.com now has 8 MX records and help.example.com has 0 MX records.
So...what am I doing wrong? How do I truly setup a subdomain on a DNS server? Help!
Thanks!
Not sure if my title correctly says what I'm trying to do, so, let me explain.
Let's say our domain is example.com. Our e-mail addresses use example.com (i.e., [email protected]) and we run our own DNS (running BIND 8.1.2, yes, I know it's old!) server on-site for example.com. We are covered by Postini for spam, viruses, etc... So, the MX records for example.com in our DNS server point to Postini (see below):
Code:
example.com IN MX 1 example.com.s9a1.psmtp.com
example.com IN MX 2 example.com.s9a2.psmtp.com
example.com IN MX 3 example.com.s9b1.psmtp.com
example.com IN MX 4 example.com.s9b2.psmtp.com
We have recently started using a new Help Desk software for tracking requests, problems, etc... It is web-based (URL is help.example.com) and allows for tickets to be submitted via e-mail. It uses postfix for the mail agent and just uses aliases for the e-mail addresses. Examples of e-mail addresses for this system are: [email protected], [email protected] and [email protected].
Since these e-mail addresses have come on-line, our tracking software is now getting spam in it, in the form of tickets! I'm assuming this is because these e-mail addresses are @help.example.com and not example.com; so, not covered by Postini.
So...I've gone to Postini and have setup a sub-domain of help.example.com. Setting up the sub-domain in DNS is where I've gotten stuck. I've copied the four MX records above (gave them 5, 6, 7 and 8 for their priority) and tacked help. to the beginning. Doing an MX test from Postini shows that example.com now has 8 MX records and help.example.com has 0 MX records.
So...what am I doing wrong? How do I truly setup a subdomain on a DNS server? Help!
Thanks!