TCP/IP Component

I would like to make a Delphi application that automaticaly sends an e-mail.
So I started wit the "SimpMail" demo on the CDROM.

I do receive mail with that little program but every time I try to send
something I get:

1014 - The protocol reply to a request indicates that there was an error in
the reply (500 Don't understand that)

Neither do I!
Is there any body who does? Or is there any body who can send me a working
example of what I would like to make.

Thanks a lot,