Ruby

Attach an Email to Another Email

Demonstrates the Chilkat Email.AttachEmail method, which attaches a copy of another email to this email object. The attached email is encapsulated in a message/rfc822 subpart. Because a copy is attached, later changes to the source email do not affect the embedded message. This example attaches one email to another.

Background: "Forward as attachment" produces exactly this structure: the original message is embedded whole as a message/rfc822 part rather than quoted into the body. This preserves the original's headers and formatting intact, which matters for forwarding to a mailbox that will re-parse it, or for reporting spam/phishing with the original evidence attached. Such parts are counted by NumAttachedMessages.

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Ruby

require 'chilkat'

success = false

#  Demonstrates the AttachEmail method, which attaches a copy of another email to this email
#  object.  The attached email is encapsulated in a message/rfc822 subpart.

innerEmail = Chilkat::CkEmail.new()
innerEmail.put_Subject("Original message")
innerEmail.put_From("alice@example.com")
innerEmail.put_Body("This is the original message being forwarded.")

email = Chilkat::CkEmail.new()
email.put_Subject("FW: Original message")
email.put_From("bob@example.com")
email.put_Body("See the attached original email.")

#  Attach a copy of the inner email as a message/rfc822 part.

success = email.AttachEmail(innerEmail)
if (success == false)
    print email.lastErrorText() + "\n";
    exit
end

print "NumAttachedMessages = " + email.get_NumAttachedMessages().to_s() + "\n";