vous aurez besoin de ce qui suit :
Imports System.Net.Mail
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Dim MyMailMessage As New MailMessage()
Dim SMTPServer As New SmtpClient("smtp.gmail.com")
MyMailMessage.From = New MailAddress("Adresse_Expediteur")
MyMailMessage.To.Add("Adresse_Destinataire")
MyMailMessage.Subject = ("Objet")
MyMailMessage.Body = ("Message")
SMTPServer.Port = ("587") 'Port
SMTPServer.Credentials = New System.Net.NetworkCredential("Adresse_Expediteur", "Mot_de_passe_expediteur")
SMTPServer.EnableSsl = True
SMTPServer.Send(MyMailMessage) 'Envoi