Zig

Check the Number of Messages in a POP3 Mailbox

Demonstrates the Chilkat MailMan.CheckMail method, which returns the number of messages currently available in the POP3 mailbox, or -1 if an error occurs. If no POP3 session is active, Chilkat connects and authenticates automatically using the configured settings. This example configures the POP3 connection and checks the message count.

Background: POP3 (Post Office Protocol version 3) is the classic protocol for downloading mail from a server to a client. A client connects, authenticates with a username and password, and can then list, retrieve, or delete messages. Modern connections use implicit TLS on port 995 (PopSsl = true). CheckMail is a quick way to ask "how many messages are waiting?" without downloading any of them.

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Zig

const std = @import("std");
const chilkat = @import("chilkat");

pub fn main() !void {
    // Demonstrates the MailMan.CheckMail method, which returns the number of messages currently
    // available in the POP3 mailbox (or -1 if an error occurs).  If no POP3 session is active,
    // Chilkat connects and authenticates automatically using the configured settings.

    const mailman = try chilkat.MailMan.init();
    defer mailman.deinit();

    // Configure the POP3 server connection.
    mailman.setMailHost("pop.example.com");
    mailman.setMailPort(995);
    mailman.setPopSsl(true);
    mailman.setPopUsername("user@example.com");
    mailman.setPopPassword("myPassword");

    // Check the mailbox.  A return value of -1 indicates an error.
    const num_messages = mailman.checkMail();
    std.debug.print("Number of messages in the mailbox: {d}\n", .{num_messages});

    // Note: Explicitly connecting/authenticating is optional.  Chilkat MailMan automatically
    // connects and authenticates -- using the property settings above -- whenever a server
    // operation requires it.  Calling the explicit connect/authenticate methods can still be
    // helpful to determine whether a failure occurs while connecting or while authenticating.
}