mail/mx/dns issues

[yournamehere]

i have a php script that uses mail() to send an email from a web page. this works perfectly fine when it is sent to a domain not hosted with my reseller package. I host my email and dns on another server and have tried everything with the dns on the reseller webhost manager. I have added the mx entry pointing to my email server and the email does not reach. The trace email comes up with nothing when sending either. I have even tried deleting the relevant dns entries via webhost manager as well, and nothing.

any ideas?

[GatorBrent]

You should use our dns to avoid any problems.

[yournamehere]

yes, but the other server is our own dedicated machine with ssh access, something gator's reseller account does not offer. Not to mention that it has been in production for over a year now and we do not want to move the dns and email just yet

[Fubacca]

I am having the exact same problem and nobody has been very eager to help.

I just need an SMTP server IP so I can put it into my script, even if I have to authenticate to it that's fine, my script can handle it. Just need the IP.