Sample code for 30+ languages & platforms
Xojo Plugin

Attach an Email to Another Email

See more Email Object Examples

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.

Chilkat Xojo Plugin Downloads

Xojo Plugin
Dim success As Boolean
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.

Dim innerEmail As New Chilkat.Email
innerEmail.Subject = "Original message"
innerEmail.From = "alice@example.com"
innerEmail.Body = "This is the original message being forwarded."

Dim email As New Chilkat.Email
email.Subject = "FW: Original message"
email.From = "bob@example.com"
email.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) Then
    System.DebugLog(email.LastErrorText)
    Return
End If

System.DebugLog("NumAttachedMessages = " + Str(email.NumAttachedMessages))