Zen-Cart defaults to using email on the host server. Host, in this case, means the box your site is on. You would need to make several changes to the system in order to use GMail, HotMail, or some other email. Besides, it is much more professional looking having mail come from [email protected] than alfie120947##################

You did not really answer Kim's question but, try using:

E-Mail Transport Method PHP
E-Mail Linefeeds CRLF
Use MIME HTML When Sending Emails true
Send E-Mails true
Email Archiving Active? true
E-Mail Friendly-Errors false
Email Address (Displayed to Contact you) [email protected]
Email Address (sent FROM) yoursite.com <[email protected]>
Emails must send from known domain? Yes
Email Admin Format? HTML