Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

PIX Issue

Hell All,

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...?


Dhaval Tandel


Re: PIX Issue


If you could post your configuration, it would be helpful to diagnose any problems in the config.

To allow incoming mails to your mail domain from external world, yes you need to allow incoming access to the SMTP port of your server from "Any".

Check your ACLs..

Hope this helps.


New Member

Re: PIX Issue


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


Jignesh Patel

New Member

Re: PIX Issue

sorry command looks like

Access-list acl_out permit tcp any host IP Address(urExchangeServer NAT IP) eq SMTP

CreatePlease login to create content