Loris Bennett wrote at 2024-11-1 10:10 +0100: > ... > mail.set_content(body, cte="quoted-printable") In the line above, you request the content to use the "cte" (= "Content-Transfer-Encoding") "quoted-printable" and consequently, the content is encoded with `quoted-printable`. Maybe, you do not need to pass `cte`?