Thanks, GroovyFish, for the welcome
I did as you said. This is what I got:
The message could not be sent because the server rejected the sender's e-mail address. The sender's e-mail address was 'drumcrazy+drumcrazydesigns.com'. Subject 'Testing', Account: 'mail.drumcrazydesigns.com', Server: 'mail.drumcrazydesigns.com', Protocol: SMTP, Server Response: '501 <drumcrazy+drumcrazydesigns.com>: sender address must contain a domain', Port: 26, Secure(SSL): No, Server Error: 501, Error Number: 0x800CCC78
Doesn't look Outlook will want me to use that + sign.
*sighs*