Zig

Check Whether an Email Is a multipart/report

Demonstrates the Chilkat Email.IsMultipartReport method, which returns true when the top-level message structure is a multipart/report (such as a bounce/DSN or a read receipt/MDN). This example loads an email and reports whether it is a multipart/report.

Background: Automated mail — delivery failures and read receipts — arrives wrapped in the multipart/report structure, which carries machine-readable report parts. Detecting it with IsMultipartReport is the first step in a bounce-handling pipeline: once you know a message is a report, you can pull its parts with GetReport or read delivery fields with GetDeliveryStatusInfo to act on failures automatically.

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Zig

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

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

    // Demonstrates the IsMultipartReport method, which returns true if the top-level message
    // structure is a multipart/report (such as a bounce / DSN or a read receipt / MDN).

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

    email.loadEml("qa_data/eml/dsn_bounce.eml") catch {
        std.debug.print("{s}\n", .{try email.getLastErrorText(alloc)});
        return;
    };

    if (email.isMultipartReport()) {
        std.debug.print("This email is a multipart/report (e.g. a bounce or read receipt).\n", .{});
    } else {
        std.debug.print("This email is not a multipart/report.\n", .{});
    }

    // Note: The path "qa_data/..." is a relative local filesystem path,
    // relative to the current working directory of the running application.
}