app-MAIL-temp/app/message_utils.py

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from email import policy
from email.message import Message
from app.log import LOG
def message_to_bytes(msg: Message) -> bytes:
"""replace Message.as_bytes() method by trying different policies"""
for generator_policy in [None, policy.SMTP, policy.SMTPUTF8]:
try:
return msg.as_bytes(policy=generator_policy)
except:
LOG.w("as_bytes() fails with %s policy", policy, exc_info=True)
msg_string = msg.as_string()
try:
return msg_string.encode()
except:
LOG.w("as_string().encode() fails", exc_info=True)
return msg_string.encode(errors="replace")