553 sorry, that domain isn't in my list of allowed rcpthosts (#5.7.1

[altincit]

I'm using my computer as a server(xp).this is an asp page with aspemail ,l am having this error message.
How can i deal with this error.

''set obj
Set Mail = Server.CreateObject("Persits.MailSender")
Mail.Host = "123.123.123.123"
Mail.AddAddress "[e-mail]"
Mail.Subject = "testing"
Mail.IsHTML = True
Mail.Body = msg_txt

On Error Resume Next
Mail.Send
If Err <> 0 Then ....

[ChadSEO]

Generally that error means that you are trying to send mail through a mail server, and 1) that server is not setup to accept mail for that domain (yahoo.com), and 2) the server is not setup to allow relaying from your server. Unless your mailhost is a yahoo mail server, it is probably not setup to accept mail for yahoo.com. Is this your mail server, or that of your ISP? Is this your webserver, or are you hosting with your ISP, or somebody else?