I have a ADSL line with a Fixed Ip address and we have a domain name XXXX.com.I have hosted a Exchange mail server behind PIX 515E firewall.This mail server is collecting the mails from the domain.
Everything is working fine and i also can able to send and receive mails from my LAN users to internet and Vice Versa..The problem i started facing where in my users when they wants to check the mails when they are on the move outside...They want to check the emails with Outlook express as a mail client with incoming and outgoing server configured as "XXXX.com"..
They can able to ping to the domain from outside which resolves to our Global IP address we have..even i can receive the mails in the outlook (when i am on move) but when i try to send the mail for outside user (if i send mail to the Internal user it works fine that means something i need to check on the PIX..i believe) i get error message which says that the relaying is denied through the SMTP server.
Whts configuration i need to check in PIX for enabling the sending the mails from outside to the external users?
Can somebody help?