Hi Hanan I have a feeling this may be because the mail server traffic is clashing with the SMTP service that maybe installed on the ISA box. I think installs and enables the SMTP service by default. I had this problem and the only clue was in the event logs. They reported that the server couldn't be published properly as another service was using the port. We checked the list of Services and SMTP was there and running. We had not installed it deliberately at all. It was the FSMO so maybe dcpromo out it there? Nothing else was installed other than Compaq tools as it was Compaq hardware. Hope that helps. Bye for now. Paul Lemonidis. ----- Original Message ----- From: hanan To: [ISAserver.org Discussion List] Sent: Tuesday, March 04, 2003 12:42 PM Subject: [isalist] publishing internal mail server http://www.ISAserver.org Hello I'm trying to publish internal mail server on isa server, I read the instruction in Dr Shinder book and I read the article on isa.org but nothing work I create a secure mail wizard on server publishing with the internal ip address of the mail server and the external ip address of the isa server I create protocol rule to allow smtp port 25 outbound, I create ip packet filter for smtp port 25 for inbound, local port fixed 25 and remote port all I can telnet the external ip address with 25 as 1.1.1.1 25 from inside I have answer, but when I try to telnet from outside I can't no answer As Dr Shinder said in his book you should be sure that your external ip address is listening to the port 25, I did netsat -na to see the external ip address with the port 25 I didn't find it , I didn't find the port 25 with my external ip address and I think here is the problem but I don't know what I must do? I can ping the external ip address from inside but I can't ping it from outside Could you please help Best regards hanan ------------------------------------------------------ List Archives: http://www.webelists.com/cgi/lyris.pl?enter=isalist ISA Server Newsletter: http://www.isaserver.org/pages/newsletter.asp ISA Server FAQ: http://www.isaserver.org/pages/larticle.asp?type=FAQ ------------------------------------------------------ Exchange Server Resource Site: http://www.msexchange.org/ Windows Security Resource Site: http://www.windowsecurity.com/ Windows 2000/NT Fax Solutions: http://www.ntfaxfaq.com ------------------------------------------------------ You are currently subscribed to this ISAserver.org Discussion List as: paul_lemonidis@xxxxxxxxxxx To unsubscribe send a blank email to $subst('Email.Unsub')