(VB.NET) GMail App Password

See more GMail SMTP/IMAP/POP Examples

Demonstrates how to authenticate using an app password with GMail for IMAP and SMTP.

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' This example requires the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code.

' Starting May 30, 2022, Google will no longer support the use of third-party apps or devices 
' which ask you to sign in to your Google Account using only your username and password.

' Instead of authenticating with your GMail username/password, a GMail user can create an App Password
' and then login using their username/app_password.   It's literally the same, except it allows a GMail
' account owner to isolate passwords to specific applications.

' The Gmail account owner would first need to make sure she has 2-Step Verification setup for her account.
' Note: The 2FA verification is not a factor when authenticating with an app password. The 2FA is required
' to setup app passwords in the Google account console.  See Sign in with App Passwords

' After the GMail account owner has setup his app password, he simply uses the app password instead of his GMail account password.

' For example:
Dim imap As New Chilkat.Imap

imap.Ssl = True
imap.Port = 993

Dim success As Boolean = imap.Connect("imap.gmail.com")
If (success = False) Then
    Debug.WriteLine(imap.LastErrorText)
    Exit Sub
End If


success = imap.Login("user@gmail.com","srnyyvqajocnsvdp")
If (success = False) Then
    Debug.WriteLine(imap.LastErrorText)
    Exit Sub
End If


Debug.WriteLine("IMAP Success!")


' For SMTP..

Dim mailman As New Chilkat.MailMan

mailman.SmtpHost = "smtp.gmail.com"

mailman.SmtpUsername = "user@gmail.com"
mailman.SmtpPassword = "srnyyvqajocnsvdp"

mailman.SmtpSsl = True
mailman.SmtpPort = 465

success = mailman.SmtpConnect()
If (success = False) Then
    Debug.WriteLine(mailman.LastErrorText)
    Exit Sub
End If


success = mailman.SmtpAuthenticate()
If (success = False) Then
    Debug.WriteLine(mailman.LastErrorText)
    Exit Sub
End If


Debug.WriteLine("SMTP Success!")