Since most mail servers use the standard ports of 25 (for SMTP) and 110 (for POP3) to send and receive mail and WinProxy's default mail settings are also port 25 and 110. You will need to either:

• disable mail in WinProxy. To disable 'Mail' in WinProxy, click on File -> Settings -> Protocols and uncheck the box next to 'Mail'.

  OR

• change WinProxy ports for both SMTP and POP3. To modify WinProxy's mail port, in WinProxy:
  1. Click on File -> Settings -> Protocols. Make sure that the box next to 'Mail' is checked.
  2. Click on 'Mail Setup'.
  3. Change the ports for both SMTP (25) and POP3 (110), so that they do not conflict with the mail server, which also uses ports 25 and 110. In our example below we changed the SMTP port to 8025 and POP3 to 8110.
  4. Click on OK -> OK.

If your ISP is relaying the email directly to your mail server you will need to open up port 25 (incoming, TCP) to allow the mail to pass through the firewall. You can not use the 'Incoming SMTP Proxy' option in the mail settings in WinProxy. In WinProxy,

1. Click on File -> Advanced Settings -> Firewall -> New Application.
2. For 'Application Name' enter in any name you want, then click on 'New Filter'.
3. For 'Filter Settings' enter in "From 25 to 25", select 'TCP' and 'Incoming', then click on Done -> OK -> OK.

By creating this filter for port 25, you have opened up the standard port on the proxy server that email programs use to connect to their SMTP server. Hence, allowing your ISP to send your email directly to you.

To allow users on the Internet to connect to your mail server, regardless of whether the mail server is running on the same computer as WinProxy or running behind the WinProxy computer, you will need to open up port 110 (incoming, TCP) to allow the mail to pass through the firewall.

To allow remote access to the mail server, in WinProxy,

1. Click on File -> Advanced Settings -> Firewall -> New Application.
2. For 'Application Name' enter in any name you want, then click on 'New Filter'.
3. For 'Filter Settings' enter in "From 110 to 110", select 'TCP' and 'Incoming', then click on Done -> OK -> OK.

By creating this filter for port 110, you have opened up the standard port on the proxy server that email programs use to connect to their POP3 server. Hence, allowing external users the ability to request for their email from your mail server.

If you are using IMAP instead of POP3, then all you will need to do is enter in port 143 under 'Filter Settings' instead of port 110, i.e. "From 143 to 143".

NOTE Be aware that with your mail server now available to the internet, *anybody* can connect to those ports. It is up to your mail server alone to handle the security of those connections, including prevention of relaying.