Aswin 0 Posted November 4, 2005 Hi, I have set up an Exchange 2003 server ( on win2k3), behind an ISA server.: ISP - (staticwanip)cisco router(10.0.0.99)-(10.0.0.203)ISAserver(192.168.0.2)- (192.168.0.1 )domain network And exchange server only port 25 is open for incomming mail to the exchange server. Problem: The exchange server can send mail to all domains: @hotmail.com / @gmail.com / @skynet.be / ... And he can recieve the mails from all domains but... But It can't recieve mails from hotmail. I see hotmail.com connecting in SMTP sessions for 600 seconds. Can someone help me, so hotmail.com (and some others) can deliver his mails? Thank you. Share this post Link to post