How to Set up Mail Proxy in Office Outlook Step by Step?

Suppose your mail account information is -

login user name(account):aaa
login password:bbb
pop3 server address(incoming server address):ccc
smtp server address(outcoming server address):ddd
smtp login user name:eee (generally same as login user name)
smtp login password:fff (generally same as login password)

Suppose your proxy address is 192.168.0.1

You need to change your mail account information in your Outlook as:

login user name(account):aaa#ccc
login password:bbb
pop3 server address(incoming server address):192.168.0.1
smtp server address(outcoming server address):192.168.0.1
smtp login user name:eee#ddd
smtp login password:fff

If your smtp server DOES NOT require a username and password that you should go to 'MORE SETTINGS'
click on the OUTGOING SERVER tab and check MY SERVER (SMTP) REQUIRES AUTHENTICATION, and then in the USERNAME field type #your.smtp.server.here and leave the PASSWORD field blank. Put a check in 'REMEMBER PASSWORD' and then click OK then FINISH.

Notes: if you are using office 2002 or office XP, you need install office sp1 first.

For more details please refer to the mail proxy settings section in the client configuration page.