VB.NET

Verify Connectivity to the POP3 Server

Demonstrates the Chilkat MailMan.VerifyPopConnection method, which tests whether a TCP/IP connection can be established with the configured POP3 server. It verifies connectivity only — it does not authenticate. This example configures the POP3 host and checks whether it can be reached.

Background: This is the POP3 counterpart to VerifySmtpConnection. It answers the first diagnostic question — can the client reach the POP3 server on the configured host and port and complete the TLS handshake? A failure here indicates a network, firewall, DNS, port, or certificate problem rather than a credentials issue, which VerifyPopLogin checks next.

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'  Demonstrates the MailMan.VerifyPopConnection method, which tests whether a TCP/IP
'  connection can be established with the configured POP3 server.  It verifies connectivity
'  only (it does not authenticate).

Dim mailman As New Chilkat.MailMan

'  Configure the POP3 server connection.
mailman.MailHost = "pop.example.com"
mailman.MailPort = 995
mailman.PopSsl = True

'  Test connectivity to the POP3 server.
Dim connected As Boolean = mailman.VerifyPopConnection()

If (connected = True) Then
    Debug.WriteLine("Successfully connected to the POP3 server.")
Else
    Debug.WriteLine("Could not connect to the POP3 server.")
End If