KeyError: b'RFC822'

[sidamos]

This code threw an unexpected exception:
messages = fetchServer.search("UNSEEN")
for uid, message_data in fetchServer.fetch(messages, "RFC822").items():
email_message = email.message_from_bytes(message_data[b"RFC822"])
->

Traceback (most recent call last):
File "/work2/imap-notify/./imap-notify.py", line 68, in
email_message = email.message_from_bytes(message_data[b"RFC822"])
~~~~~~~~~~~~^^^^^^^^^^^
KeyError: b'RFC822'

I cannot reproduce it with the same mails.

[mjs]

This is likely the same as #334