PHP Extension

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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<?php

include("chilkat.php");

//  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).

$mailman = new CkMailMan();

//  Configure the POP3 server connection.
$mailman->put_MailHost('pop.example.com');
$mailman->put_MailPort(995);
$mailman->put_PopSsl(true);

//  Test connectivity to the POP3 server.
$connected = $mailman->VerifyPopConnection();

if ($connected == true) {
    print 'Successfully connected to the POP3 server.' . "\n";
}
else {
    print 'Could not connect to the POP3 server.' . "\n";
}


?>