Many MUA don't recognize charset "eucgb2312_cn" in email header #88726

assignee = None
closed_at = None
created_at = <Date 2021-07-04.08:32:11.133>
labels = ['type-bug', 'expert-email', '3.9']
title = 'Many MUA don\'t recognize charset "eucgb2312_cn" in email header'
updated_at = <Date 2021-07-09.19:33:45.681>
user = 'https://bugs.python.org/tommylikehu'

activity = <Date 2021-07-09.19:33:45.681>
actor = 'terry.reedy'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['email']
creation = <Date 2021-07-04.08:32:11.133>
creator = 'tommylikehu'
dependencies = []
files = []
hgrepos = []
issue_num = 44560
keywords = []
message_count = 3.0
messages = ['396939', '397045', '397210']
nosy_count = 5.0
nosy_names = ['barry', 'terry.reedy', 'r.david.murray', 'corona10', 'tommylikehu']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue44560'
versions = ['Python 3.9']