Rust
Rust
Count the Attached Messages in an Email
See more Email Object Examples
Demonstrates the read-only Chilkat Email.NumAttachedMessages property, which is the number of embedded emails represented by message/rfc822 MIME parts. These are counted separately from ordinary attachments and related items, and their indexes are zero-based. This example builds an inner email, attaches it to an outer email as a nested message, and prints the count.
Background: When you "forward as attachment," many mail clients embed the original message as a complete nested email rather than quoting its text. In MIME this appears as a
message/rfc822 part — an entire email (its own headers and body) tucked inside the carrier message. Chilkat distinguishes three kinds of enclosed content: ordinary attachments (NumAttachments), inline related items (NumRelatedItems), and these nested messages (NumAttachedMessages). Use GetAttachedEmail to pull an embedded message into its own Email object.Chilkat Rust Downloads
// Demonstrates the read-only Email.NumAttachedMessages property, which is the
// number of embedded emails (message/rfc822 MIME parts) contained in the email.
// Create an inner email that we'll attach as a complete nested message.
let inner_email = chilkat::Email::new();
inner_email.set_subject("I am an attached message");
inner_email.set_body("This entire email is nested inside another email.");
inner_email.set_from("alice@example.com");
let _ = inner_email.add_to("Bob", "bob@example.com");
// Create the outer email and attach the inner email directly as a
// message/rfc822 part. AttachEmail attaches a copy of the inner email.
let email = chilkat::Email::new();
email.set_subject("Outer email with an attached message");
email.set_body("See the attached email.");
let _ = email.attach_email(&inner_email).is_ok();
println!("NumAttachedMessages = {}", email.num_attached_messages());