Zig

Create Non-Multipart Email with XML Body that is an Attachment

See more SMTP Examples

Creates an email where the only body is a binary WAV file. The technique used in the example could be applied to other binary files, such as PDF, MS-WORD docs, Excel docs, etc. 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 goal of this example is to create an email that has this MIME format,
    // where the body of the email is XML using base64 encoding,
    // and the Content-Type and Content-Disposition are set as indicated.

    // Date: Wed, 23 Aug 2023 09:01:52 +0200 (CEST)
    // From: joe@example1.com
    // Subject: [v=EMCS.NL][a=NL****][k=****][s=0]
    // To: mary@example2.com
    // MIME-Version: 1.0
    // Content-Type: application/octet-stream; charset=us-ascii; name=6bd8dfe259b3a42c90a28a82b5fc6e77.txt
    // Content-Transfer-Encoding: Base64
    // Content-Disposition: attachment; filename=6bd8dfe259b3a42c90a28a82b5fc6e77.txt
    // Message-Id: <......>
    //
    // <multi-line base64 encoded XML here>

    const xml_body = "<ie:IE801 xmlns:ie=\"urn:publicid:-:EC:DGTAXUD:EMCS:PHASE4:IE801:V3.01\" xmlns:tms=\"urn:publicid:-:EC:DGTAXUD:EMCS:PHASE4:TMS:V3.01\">....</ie:IE801>";

    const email = try chilkat.Email.init();
    defer email.deinit();

    // Add subject, TO, FROM, etc.
    email.setSubject("[v=EMCS.NL][a=NL****][k=****][s=0]");
    email.setFrom("joe@example1.com");
    try email.addTo("Mary", "mary@example2.com");

    email.setBody(xml_body);

    email.addHeaderField("Content-Transfer-Encoding", "Base64");
    email.addHeaderField("Content-Type", "application/octet-stream; charset=us-ascii; name=6bd8dfe259b3a42c90a28a82b5fc6e77.txt");
    email.addHeaderField("Content-Disposition", "attachment; filename=6bd8dfe259b3a42c90a28a82b5fc6e77.txt");

    // Your email is ready to send
    const mailman = try chilkat.MailMan.init();
    defer mailman.deinit();

    mailman.setSmtpHost("smtp.my_mail_server.com");
    mailman.setSmtpUsername("myUsername");
    mailman.setSmtpPassword("myPassword");
    mailman.setSmtpPort(465);
    mailman.setSmtpSsl(true);
    mailman.setStartTLS(true);

    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", .{});
}