Thanks for this Peter but it doesn't mean much to me at my stage of understanding. I've been kicking this around but I can't see any way to proceed further. I guess I'll have to give up and try php perhaps, if I am to develop my own mail list application. Yassou!

Well, after a couple of months, without any more encouragement, I have to conclude I have wasted my time and money on Wrox and VB. It promised a lot, but the result is unsatisfactory. I will abandon my books and software and try something else, maybe php and MySQL. Good night and good luck.

Hi People.... I can resolve this problem... just enter this codes

 Public Function mandar_email(ByVal email As String)
        Dim my_email As System.Web.Mail.SmtpMail
        Dim from As String = "[email protected]"
        Dim mailto As String = email
        Dim subject As String = "Orçamento aberto"
        Dim body As String = "acesse o site e de o seu lance"
        my_email.SmtpServer = "smtp.unicenp.edu.br"
        my_email.Send(from, mailto, subject, body)

    End Function

Ok, here in Brasil works nice..... i lost a lot time to resolve this problem :-)
[email protected]