I have several people that have email addys with the same domain name that Exchange servers use that work exclusively out of the office. Therefore their email doesn't go thru servers, I have their boxes on ISP side. So that people internally can send them mail I set up some Custom Recipients (SMTP) in 5.5 which worked well. I am now in progress of moving users off of 5.5 and onto new '03 server. The people on the new server cannot send mail to anyone that was set up as a custom recipient (5.5) or as a contact ('03) that has same domain name (@domain.com) as servers. BTW domain name didn't change only added new '03 to org of 2 5.5's.
How do I fix this?