If your ISP does not provide SMTP server service for your use, you may use the Doteasy mail server for SMTP. You will have to specify your Outlook Express software to authenticate in order for the SMTP server to accept your outgoing email.
After you have configured your email account in Outlook Express, select Accounts from the Tools menu.
Select the Mail tab, highlight your email account and click Properties.
Select the Servers tab and ensure that the SMTP server is defined as mail.yourdomain.com. (Replace yourdomain.com with your domain name)
Check My server requires authentication and Click Apply.
Congratulations! You have successfully configured your POP email software to use the Doteasy email server as your SMTP server.