KevinTheJedi I upgraded to 1.17.2 - same problem. Body of the test email is scrambled.
Example:
This is a message in Mime Format. If you see this, your mail reader does not support this format.
--=_4cae0dd5601c8663fb104821c39c03b4
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: base64
VGVzdCBUZXN0IFRlc3QKUmVmLU1pZDogQkZubjk5RC1HQzVfby1BQUFBQUFBQUFBQUFBQUFB
UHd2QmtDYngtc3VwcG9ydEBvc2hpdC5wcm8K
--=_4cae0dd5601c8663fb104821c39c03b4
Content-Type: text/html; charset=utf-8
Content-Transfer-Encoding: base64
PHA+VGVzdCBUZXN0IFRlc3Q8L3A+
--=_4cae0dd5601c8663fb104821c39c03b4--
