I have mail server running behind the PIX Firewall, i fount that mail server is running well inside the network, but while sending mail from GMAIL ot YAHOO or any other mail server to my mail server, its dosent work. and our mail server isnt log any thing process too. But still i can send mails from my mail server to any other mail server.
My question is,
1)is there any configuration required except NAT forwarding for port number 25, 110 for SMTP and POP3.
2)do i need to allow all the network for SMTP as incoming traffic...?