I've a big problem with smtphost and dtml-sendmail

I encountered this problem when i ran this dtml codes:

<dtml-sendmail smtphost="mail.mysmtphost.net"> To: <myaddress@mysmtphost.net> Message: I wish to see U later </dtml-sendmail>

Error Type: SMTPSenderRefused Error Value: (505, 'Authentication required', 'myaddress@mysmtphost.net')

Aw nuts, I forgot. I wanted to add authentication support to Zope 2.7. Ah well, too late now, has to be 2.8. Anyway, until then, you can try a product called ESMTP MailHost that supposedly does this. http://www.zope.org/Members/bowerymarc/ESMTPMailHost