STARTTLS Send E-Mail Sample Code

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Download Chilkat .NET for 1.0 / 1.1 Framework

Sending email over a secure channel using STARTTLS is identical to sending email w/out STARTTLS. The only difference is that we set the mailman.StartTLS property = true. When the mailman sends email, it will first connect to the SMTP server via the normal unsecure port 25. It will then issue a STARTTLS command to make the channel secure, login, and send the email. Both the login (if necessary) and mail sending are over the secure channel.

        Dim mailman As New Chilkat.MailMan()

        ' Any string passed to UnlockComponent automatically begins a 30-day trial.
        Dim success As Boolean
        success = mailman.UnlockComponent("Hello World")
        If (success <> true) Then
            MsgBox(mailman.LastErrorText)
            Exit Sub
        End If

        mailman.SmtpHost = "smtp.comcast.net"
        mailman.StartTLS = True

        Dim email As New Chilkat.Email
        email.AddTo("Chilkat Support", "support@chilkatsoft.com")
        email.AddTo("Chilkat Sales", "sales@chilkatsoft.com")
        email.From = "Matt Fausey <fausey@chilkatsoft.com>"

        email.Subject = "This is a test"
        email.SetHtmlBody("<html><body><h1>This is a test</h1><p>Hello World!</p></body></html>")

        success = mailman.SendEmail(email)

        If (Not success) Then
            MessageBox.Show(mailman.LastErrorText)
        Else
            ' Show the LastErrorText anyway, because is will include
            ' informational messages and we can verify for testing that the
            ' StartTLS actually happened.
            ' You will see this message: "Error authenticating server credentials",
            ' which can be ignored.
            MessageBox.Show(mailman.LastErrorText)
        End If

Need a specific example? Send a request to support@chilkatsoft.com

Mail Component · XML Parser