Zig

SMTP using HTTP Proxy

Demonstrates how to communicate with an SMTP server via an HTTP proxy. Zig

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

pub fn main(init: std.process.Init) !void {
    const alloc = init.arena.allocator();

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    // The mailman object is used for sending and receiving email.
    const mailman = try chilkat.MailMan.init();
    defer mailman.deinit();

    // To connect through an HTTP proxy, set the HttpProxyHostname
    // and HttpProxyPort properties to the hostname (or IP address)
    // and port of the HTTP proxy.  Typical port numbers used by
    // HTTP proxy servers are 3128 and 8080.
    mailman.setHttpProxyHostname("www.my-http-proxy.com");
    mailman.setHttpProxyPort(3128);

    // Important:  Your HTTP proxy server must allow non-HTTP
    // traffic to pass.  Otherwise this does not work.

    // Set the SMTP server.
    mailman.setSmtpHost("smtp.chilkatsoft.com");

    // Set the SMTP login/password (if required)
    mailman.setSmtpUsername("myUsername");
    mailman.setSmtpPassword("myPassword");

    // Create a new email object
    const email = try chilkat.Email.init();
    defer email.deinit();

    email.setSubject("This is a test");
    email.setBody("This is a test");
    email.setFrom("Chilkat Support <support@chilkatsoft.com>");
    try email.addTo("Chilkat Admin", "admin@chilkatsoft.com");

    // Call SendEmail to connect to the SMTP server via the HTTP proxy and send.
    // The connection (i.e. session) to the SMTP server remains
    // open so that subsequent SendEmail calls may use the
    // same connection.
    mailman.sendEmail(email) catch {
        std.debug.print("{s}\n", .{try mailman.getLastErrorText(alloc)});
        return;
    };

    // Some SMTP servers do not actually send the email until
    // the connection is closed.  In these cases, it is necessary to
    // call CloseSmtpConnection for the mail to be  sent.
    // Most SMTP servers send the email immediately, and it is
    // not required to close the connection.  We'll close it here
    // for the example:
    mailman.closeSmtpConnection() catch {
        std.debug.print("Connection to SMTP server not closed cleanly.\n", .{});
    };

    std.debug.print("Mail Sent!\n", .{});
}