[Zope] Sendmail and smtphost

[trashMan]

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 at mysmtphost.net>
Message: I wish to see U later
</dtml-sendmail>

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


I've the problem: the smtphost needed id and pwd but i don't know how
send it! 
Can you say me a solutions please?


Massimiliano