Zig

Send Email with Multiple Reply-To Addresses

See more SMTP Examples

Send email with multiple repy-to addresses.

Note: Some mail servers will remove the extra email addresses from the Reply-To header. Even if you provide multiple reply-to addresses, the email may arrive with only the 1st.

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.

    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);

    // 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("Joe <joe@example.com>");
    try email.addTo("Mary", "mary@example2.com");

    // Specify a single reply-to address, which will get replace with a list of addresses..
    email.setReplyTo("placeholder@example.com");

    // Get the email as MIME.
    const sb_mime = try chilkat.StringBuilder.init();
    defer sb_mime.deinit();
    mailman.renderToMimeSb(email, sb_mime) catch {};

    // Update the Reply-To MIME header with a list of email addresses.
    const reply_to_addrs = "joe@example.com, mike@example.com";
    sb_mime.replaceAllBetween("Reply-To: ", "\r\n", reply_to_addrs, false) catch {};

    // Examine the MIME to be sent:
    std.debug.print("{s}\n", .{try sb_mime.getAsString(alloc)});

    // Here's the MIME:

    // MIME-Version: 1.0
    // Date: Tue, 03 Sep 2024 08:18:12 -0500
    // Message-ID: <D892B0E563A7A13B1F499530DE21529714EA479A@SLICE>
    // Content-Type: text/plain; charset=us-ascii; format=flowed
    // Content-Transfer-Encoding: 7bit
    // X-Priority: 3 (Normal)
    // Subject: This is a test
    // From: Joe <joe@example.com>
    // To: Mary <mary@example2.com>
    // Reply-To: joe@example.com, mike@example.com
    //
    // This is a test

    // ---------
    // Send the MIME...
    mailman.sendMime("joe@example.com", "mary@example2.com", try sb_mime.getAsString(alloc)) 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", .{});
}