Letter decoding how to do?

Question

Python

I want to read the last letter that I received for reading using imaplib, But the subject and text of the letter are encrypted, how to decrypt? The text that gives me and the code below

('none none', 'The mail came from here')
Wed, 28 Jul 2021 00:36:09 +0300
=?UTF-8?B?0J3QvtCy0LDRjyDQt9Cw0Y/QstC60LAg4oSWMzY3ODk0MTE=?=
< CAAzzXJgMW=tfFRHAKs+5eBujcphz5bnmail.b5g .com >

The code

import imaplib
import email

mail = imaplib.IMAP4_SSL('imap.gmail.com')
mail.login('***', '***')
 
mail.list()
mail.select("inbox")

result, data = mail.search(None, "ALL")
 
ids = data[0]
id_list = ids.split()
latest_email_id = id_list[-1]
 
result, data = mail.fetch(latest_email_id, "(RFC822)")
raw_email = data[0][1]
raw_email_string = raw_email.decode()

email_message = email.message_from_string(raw_email_string)

print(email.utils.parseaddr(email_message['From']))
print(email_message['Date'])
print(email_message['Subject'])
print(email_message['Message-Id'])

Answer 1

Subject and text of the letter in base64

=?UTF-8?B? 0J3QvtCy0LDRjyDQt9Cw0Y/QstC60LAg4oSWMzY3ODk0MTE= ?=

It just contains information about encoding:
UTF-8 - character encoding
B - Base64 encoding in which it is transmitted

from email.header import decode_header

subject = email_message['Subject']
bytes, encoding = decode_header(subject)[0]
print(bytes.decode(encoding))