使用格式“email”添加附件

Question

Is it possible to generate an email and add this email to another email's attachment?
I have only found ways to add files like pdf or jpeg but not a mail.

EDIT: my problem is that I can't store the email on the server to add it to the attachment

Answer 1

As the comments say, it's exactly like adding any other attachment, and it's up to you to get the message into a suitable external text file (or string).

The only differences are that external email messages are usually saved with a .eml extension, and should use the message/rfc822 MIME type, which PHPMailer knows about and will set automatically given a file with a .eml extension.