SMTP email policy does not encode non-ASCII characters

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2020-04-02.13:52:09.254>
labels = ['3.8', 'type-bug', '3.7', 'expert-email']
title = 'SMTP email policy does not encode non-ASCII characters'
updated_at = <Date 2020-04-02.13:52:09.254>
user = 'https://github.com/aepsil0n'

bugs.python.org fields:

activity = <Date 2020-04-02.13:52:09.254>
actor = 'aepsil0n'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['email']
creation = <Date 2020-04-02.13:52:09.254>
creator = 'aepsil0n'
dependencies = []
files = ['49026']
hgrepos = []
issue_num = 40157
keywords = []
message_count = 1.0
messages = ['365596']
nosy_count = 3.0
nosy_names = ['barry', 'r.david.murray', 'aepsil0n']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue40157'
versions = ['Python 3.6', 'Python 3.7', 'Python 3.8']