Rust

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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Rust

// 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).

let mailman = chilkat::MailMan::new();

// Configure the POP3 server connection.
mailman.set_mail_host("pop.example.com");
mailman.set_mail_port(995);
mailman.set_pop_ssl(true);

// Test connectivity to the POP3 server.
let connected = mailman.verify_pop_connection();

if connected {
    println!("Successfully connected to the POP3 server.");
} else {
    println!("Could not connect to the POP3 server.");
}