Hello, I have an Exchange 2007 server everything works fine, I can receive emails internally and externally. The ports are opened on my router. I am able to telnet the port 25 from my lan network but not from the outside, I received a timeout. I did several tests and my Juniper router blocks telnet on port 25. My question is: How it happens that I am unable to telnet when the SMTP service works perfectly? Thanks to all DS

Perhaps the firewall only accepts traffic from certain IP addresses?Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."

I found my issue, the seconde internet line thatI used to do the telnet, blocks the port 25 in the outside. That why I'm not able to do the telnet. I tried with a professional access, and that works perfect !!!