I tried to send email like this:
Dim EmailFrom As String = "firstname.lastname@example.org"
Dim EmailTo As String = "email@example.com"
Dim Subject As String = "Send Email"
Dim Body As String = "I'm tryin to send email"
System.Web.Mail.SmtpMail.Send(EmailFrom, EmailTo, Subject, Body)
But it showed me this error:
The "SendUsing" configuration value is invalid
so how can i send email and wt is the SmtpMail?!