Penhall & Stephen,
OK! I think this might be starting to happen now. I spoke with my customer and asked them to call their ISP and ask for mail settings. They gave me settings for both the mail Domain and the SMTP Domain.
They also told my customer that they will not only receive their Domain email that would normally be sent to our server, but that they could also mask the outgoing emails to appear that they are coming from
[email protected]!
I have one last question for the experts!
When changing the MX records, do I have to make one entry for mail.theirhost.com and another one for smtp.theirhost.com? OR, should I just add one entry (being the first one listed above)?
Thanks again guys!