mail: migrate to modern email.message instead of using old compat32 functionality Before, the HTML part could be detected as pure 7-bit and sent as: Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: 7bit Now, it will use: Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable That should work fine too.

pytest >= 4.6.6, < 5.5
pytest-sugar >= 0.9.2, < 0.10
pytest-benchmark >= 3.2.2, < 3.3
pytest-localserver >= 0.5.0, < 0.6
mock >= 3.0.0, < 4.1
Sphinx >= 1.8.0, < 3.1
WebTest >= 2.0.6, < 2.1
isort == 5.1.2
pyflakes == 2.2.0