The following instructions are assuming your ISP does
block SMTP port 25 other than their own. We are finding more ISPs are beginning
to block port 25 so the following instructions will prevent any issues if they
do decide to change the port blocking scheme without your knowledge.
While the following is a setup for Outlook 2003, earlier versions of Outlook
should have similar setup setup steps.

Go to Tools -> E-mail Accounts

Click "Add a new e-mail account" and click on Next.

Click on POP3 and click Next.

Fill in the information about your email account. Please make
sure the "User Name:" field has the full email address. Click on "More
Settings".

Click on the "Outgoing Server" tab and click on "My outgoing server (SMTP)
requires authentication"
(Applies if you use our mail server in your outgoing mail (SMTP) server
settings.)

Click on the "Advanced" Tab and change the "Outgoing
server (SMTP)" to port: 2525
You can Click OK and start using your mail software.