How to remove MIME?

You mean you are seeing these headers in the message body of mail?

Hey mate,

yes, how can I remove it? I put into additional headers this code “Reply to: [email protected]” and into the message body just text like “Der [name] [lastname] Thank you for …”

Thanks so much!

Reply to: [email protected]

This is in an incorrect header format. It should be “Reply-To”. No space in a header name.

Submitted by: <[email protected]>

This is incorrect, too.