Formulir kontak tidak mengirim email ke akun gmail saya

Saya telah membuat formulir sederhana menggunakan Visual Studio 2012 tetapi tidak mengirim email ke akun gmail saya, halaman berjalan dengan baik tetapi ketika saya menekan tombol kirim saya mendapatkan kesalahan:

Server SMTP memerlukan sambungan aman atau klien tidak diautentikasi. Respons server adalah: 5.7.0 Harus mengeluarkan perintah STARTTLS terlebih dahulu. j8sm1567623paz.30

Deskripsi: Pengecualian yang tidak ditangani terjadi selama eksekusi permintaan web saat ini. Harap tinjau pelacakan tumpukan untuk informasi lebih lanjut tentang kesalahan dan dari mana asalnya dalam kode.

Detail Pengecualian: System.Net.Mail.SmtpException: Server SMTP memerlukan koneksi aman atau klien tidak diautentikasi. Respons server adalah: 5.7.0 Harus mengeluarkan perintah STARTTLS terlebih dahulu. j8sm1567623paz.30

Source Error: 
Line 14: 
Line 15:         
Line 16:         mailClient.Send(message)
Line 17:         
Line 18:    

Source File: C:\Website SVN II\test\contact.aspx.vb    Line: 16

Sumber:

Imports System.Net.Mail

Partial Class contact
 Inherits System.Web.UI.Page

Protected Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
    sendMail(txtEmail.Text, txtMessage.Text)
End Sub

Protected Sub sendMail(ByVal From As String, ByVal body As String)
    Dim mailservername As String = "smtp.gmail.com"
    Dim message As MailMessage = New MailMessage(From, "[email protected]", "feedback", body)
    Dim mailClient As SmtpClient = New SmtpClient

    mailClient.Host = mailservername
    mailClient.Send(message)
    message.Dispose()
End Sub

End Class

HTML.

        first name
        <asp:TextBox ID="txtFName" runat="server"></asp:TextBox>

        <br />
        <br />

        last name 
        <asp:TextBox ID="txtLName" runat="server"></asp:TextBox>

        <br />
        <br />

        email
        <asp:TextBox ID="txtEmail" runat="server"></asp:TextBox>
       
        <br />
        <br />            

        message: 
        <asp:TextBox ID="txtMessage" runat="server" TextMode="MultiLine"></asp:TextBox>

        <br />

        <asp:Button ID="Button1" runat="server" Text="Send" />

gmail vb.net imap
person user1830770    schedule 16.11.2012    source sumber
comment
Sepertinya server email menginginkan koneksi aman dan Anda tidak memintanya.   -  person itsbruce    schedule 17.11.2012
comment
Terkait (tentang gmail/.net), stackoverflow.com/questions/3615674/, stackoverflow.com/questions/10690015/, stackoverflow.com/questions/1905019/   -  person Kratz    schedule 17.11.2012

Jawaban (1)


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Dua hal:

  1. Anda perlu menggunakan HTTPS.
  2. Anda perlu memberikan kredensial untuk akun Anda.

Berikut contoh C# dari di sini:

using System.Net;
using System.Net.Mail;

var fromAddress = new MailAddress("[email protected]", "From Name");
var toAddress = new MailAddress("[email protected]", "To Name");
const string fromPassword = "fromPassword";
const string subject = "Subject";
const string body = "Body";

var smtp = new SmtpClient
           {
               Host = "smtp.gmail.com",
               Port = 587,
               EnableSsl = true,
               DeliveryMethod = SmtpDeliveryMethod.Network,
               UseDefaultCredentials = false,
               Credentials = new NetworkCredential(fromAddress.Address, fromPassword)
           };
using (var message = new MailMessage(fromAddress, toAddress)
                     {
                         Subject = subject,
                         Body = body
                     })
{
    smtp.Send(message);
}

versi vb.net:

Private Sub Button1_Click(ByVal sender As System.Object, _
    ByVal e As System.EventArgs) Handles Button1.Click
    Dim SmtpServer As New SmtpClient()
    SmtpServer.Credentials = New Net.NetworkCredential
                ("[email protected]", "password")
    SmtpServer.Port = 587
    SmtpServer.Host = "smtp.gmail.com"
    SmtpServer.EnableSsl = True

    mail = New MailMessage()
    Dim addr() As String = TextBox1.Text.Split(",")
    Try
        mail.From = New MailAddress("[email protected]",
            "Web Developers", System.Text.Encoding.UTF8)

        Dim i As Byte
        For i = 0 To addr.Length - 1
            mail.To.Add(addr(i))
        Next
        mail.Subject = TextBox3.Text
        mail.Body = TextBox4.Text
        If ListBox1.Items.Count <> 0 Then
            For i = 0 To ListBox1.Items.Count - 1
                mail.Attachments.Add(New Attachment
                    (ListBox1.Items.Item(i)))
            Next
        End If
        mail.DeliveryNotificationOptions =
                DeliveryNotificationOptions.OnFailure
        mail.ReplyTo = New MailAddress(TextBox1.Text)
        SmtpServer.Send(mail)
    Catch ex As Exception
        MsgBox(ex.ToString())
    End Try
End Sub
person RAS    schedule 16.11.2012