VB.NET

Verify POP3 Login (Connect and Authenticate)

Demonstrates the Chilkat MailMan.VerifyPopLogin method, which tests whether Chilkat can connect to the configured POP3 server and successfully log in using the current POP3 authentication settings. This example configures the POP3 host and credentials and verifies login.

Background: POP3 login is the USER/PASS (or APOP/SASL) exchange that follows connecting. VerifyPopLogin performs the full round trip — connect, TLS, and authenticate — making it the go-to preflight check for validating a mailbox's credentials. A false result after VerifyPopConnection succeeds isolates the problem to the username or password.

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VB.NET

Dim success As Boolean = False

'  Demonstrates the MailMan.VerifyPopLogin method, which tests whether Chilkat can connect to
'  the configured POP3 server and successfully log in using the current POP3 authentication
'  settings.

Dim mailman As New Chilkat.MailMan

'  Configure the POP3 server connection.
mailman.MailHost = "pop.example.com"
mailman.MailPort = 995
mailman.PopSsl = True
mailman.PopUsername = "user@example.com"
mailman.PopPassword = "myPassword"

'  Test both connectivity and login.
Dim loggedIn As Boolean = mailman.VerifyPopLogin()

If (loggedIn = True) Then
    Debug.WriteLine("Successfully connected and logged in to the POP3 server.")
Else
    Debug.WriteLine("POP3 connect or login failed.")
End If