Zig

Send High Priority Email (SMTP, X-Priority header)

Demonstrates how to send high-priorty email (or lower priority email) by setting the X-Priority header field. 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();

    // Set the SMTP server (obviously, use your SMTP server, not chilkatsoft.com)
    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");
    // To add more recipients, call AddTo, AddCC, or AddBcc once per recipient.

    // To send high-priority email,
    // add the X-Priority header field with the value "1"
    // to indicate highest-priority.
    // A value of "3" is normal, which is the same as not setting
    // the X-Priority header at all, and "5" is the lowest.
    // "2" and "4" are in-betweens.

    // Microsoft Outlook might add the following headers when
    // sending high-priority email.

    // X-Priority: 1 (Highest)
    // X-MSMail-Priority: High
    // Importance: High

    // The X-Priority header alone is enough to make the email high-priority.

    email.addHeaderField("X-Priority", "1");

    // Call SendEmail to connect to the SMTP server 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;
    };

    mailman.closeSmtpConnection() catch {
        std.debug.print("Connection to SMTP server not closed cleanly.\n", .{});
    };

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