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...?
if you are using your MX Record at ur Service Provider then u don't need to open any port from outside to Inside , But if your MX Record is Hosted Direct to ur server then u need to open SMTP Port for Outside To Inside Access.
Access-list acl_out permit tcp host any host IP Address(urExchangeServer NAT IP) eq SMTP
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