I can send mail from accounts on a sbs 2003 exchange server to almost domains excepts tampabay.rr.com email address. The servers' ISP is brighthouse/Tampa Road runner, I succesfully sent mail to hotmial, yahoo, my own domains. Everytime i try to send to rr address it gets stuck in the queue.
nslookup work fine, reverse dns appears to be working from free internet look ups. I sent a friend an email to gmail andhe said that the revese was domian.com rather than mail.domain.com. Not really sure what is going on. please help