Sending Mail through SMTP in ASP.Net

[mgpsivan]

Hi
i'm trying to send mail to an gmail or yahoo id from an ASP.Net application by SMTP service using the following code..

Dim msg As New Net.Mail.MailMessage(TextBox1.Text, TextBox2.Text, TextBox3.Text, TextBox4.Text)
 
Dim mySmtp As New Net.Mail.SmtpClient("IP ADDRESS")
Try
mySmtp.Send(msg)
Label5.Text = "Mail Sent"
Catch ex As Exception
Label5.Text = ex.Message
End Try

but it returns me the following error
Mailbox unavailable. The server response was: 5.7.1 Unable to relay for toMAILID

Regards
Sivan.G

[Plater]

SMTP servers will frequently reply that they "do not forward mail" when you have not correctly logged yourself in. Make sure that you are logging in with a valid set of user/password credentials

Also, if you are using gmail as your smtp server, make sure the account that you are using has pop/smtp access enabled in the settings (have to log into gmail.com to find them)
And yahoo doesn't allow pop/smtp access unles you have a paid account.

[Frinavale]

Hi
i'm trying to send mail to an gmail or yahoo id from an ASP.Net application by SMTP service using the following code..

Dim msg As New Net.Mail.MailMessage(TextBox1.Text, TextBox2.Text, TextBox3.Text, TextBox4.Text)
 
Dim mySmtp As New Net.Mail.SmtpClient("IP ADDRESS")
Try
mySmtp.Send(msg)
Label5.Text = "Mail Sent"
Catch ex As Exception
Label5.Text = ex.Message
End Try

but it returns me the following error
Mailbox unavailable. The server response was: 5.7.1 Unable to relay for toMAILID

Regards
Sivan.G

Have you seen the Quick Reference on how to send an email in .NET?

Are you trying to connect to a gmail (or yahoo) account and send an email from their SMTP server there using your application?

Or are you connecting to another SMTP server and sending the email to a gmail or yahoo email address?

Please note that if you are using either the gmail or yahoo SMTP servers to send your emails, you will be require to provide credentials. Also, I think that the gmail SMTP server uses some sort of SSL and you have to take this into consideration.

-Frinny