Hosting mail but not website

[bluejhavoc]

Problem is I can get the email working but then I knock out access to this customers website when the mail is up and running. I am only disabling access to the website for users on my network. But this is a very regional site so access is needed. I think it is a DNS problem but I'm not sure.

Any help is appreciated!

[dezignguy]

I think I'd need more information before I attempted to guess what's wrong... you haven't given many details, and there's too many unasnwered questions.

But if you host their dns, then you need to make sure their site's ip addresses are all pointing to their other servers... and that you only have the mx entries pointing to your server.

If the dns is hosted elsewhere... then you just need to point the mx to your server, and make no other changes to the zone.

[bluejhavoc]

I did that and I am getting this response from dnsreport.com
FAIL
Acceptance of postmaster address ERROR: One or more of your mailservers does not accept mail to postmaster@domain.com. Mailservers are required (RFC822 6.3, RFC1123 5.2.7, and RFC2821 4.5.1) to accept mail to postmaster.
mail.cdomain.com's postmaster response: >>> RCPT TO:<postmaster@domain.com> <<< 550-test.dnsstuff.com (test.DNSreport.com) [0.0.0.0] is currently not 550-permitted to relay through this server. Perhaps you have not logged into 550-the pop/imap server in the last 30 minutes or do not have SMTP 550 Authentication turned on in your email client.
WARN Acceptance of abuse address

WARNING:
One or more of your mailservers does not accept mail to abuse@cambridgeyachtbrokers.com. Mailservers are expected by RFC2142 to accept mail to abuse.

mail.cambridgeyachtbrokers.com's abuse response:
>>> RCPT TO:<abuse@domain.com>
<<< 550-test.dnsstuff.com (test.DNSreport.com) [0.0.0.0] is currently not
550-permitted to relay through this server. Perhaps you have not logged into
550-the pop/imap server in the last 30 minutes or do not have SMTP
550 Authentication turned on in your email client.

If you need more info let me know

Scott