I need to turn reverse Dns off on my Raq 4. Ever since upgrading from Sambar, a Windows based server to the Raq 4 I have nothing but grief. People keep getting bounces and my guess is its the reverse DNS. My upstream has reverse Dns configured for me but it must be running slow or something. Any other ideas?

I really have no idea what could be wrong if its not this. Email from Yahoo pop's right through but some SMTP servers just cannot get through. Any other idea's? The Raq is also acting as a DNS server for its own domain and MX records.

Matt