Original setup as follows:
Web and MX record pointed to: 18.104.22.168 for stingray-webdesign.com
All email addresses work fine there.
Installed a new instance of ispconfig at 22.214.171.124.
Pointed Web and MX record to 126.96.36.199.
Now all my emails get bounced back to me stating:
The following recipient(s) could not be reached:
on 2/5/2007 3:49 PM
The e-mail account does not exist at the organization this message was sent to. Check the e-mail address, or contact the recipient directly to find out the correct address.
<smail.lasalletown.com #5.1.1 smtp;550 5.1.1 <firstname.lastname@example.org>: Recipient address rejected: User unknown in local recipient table>
I have other domains running at 188.8.131.52 and I have no problems with the emails with them, only with this domain. This specific domain is the host of the ISPConfig server (webserver.stingray-webdesign.com).
For example you can email email@example.com
and have a successful send, but when you email firstname.lastname@example.org
your email will be bounced back.