Rest-API Aufruf bei Mailempfang

#!/usr/bin/env python3
# ==================================================================================
# CONNECT TO IMAP MAILBOX AND PROCESS MESSAGES FROM SPECIFIC USER
# ==================================================================================

#======= IMPORTS ========
import imaplib
import email
import os
import sys
import re
import requests

# ======= VARS ==========
# MAILSERVER
SERVER = 'imap.domain.tld'  
# USERNAME
USERNAME = 'USERNAME'  
# PASSWORD
PASSWORD = 'PASSWORD'  
# from email
MAILFROM = 'user@domain.tld'  
# ======= CODE ===========

try:
	# connect to server
	conn = imaplib.IMAP4_SSL(SERVER)
	# login into mailbox
	ret,details = conn.login(USERNAME,PASSWORD)
	if ret != 'OK':  
		raise Exception('Not able to sign in.')  
	# select inbox
	ret, data = conn.select('INBOX')  
	if ret != 'OK':  
		raise Exception('ERROR, could not select INBOX folder (name correct?).')  
	# filter out mails
	(ret, messages) = conn.search(None,'UNSEEN')  
	if ret != 'OK':  
			raise Exception('Could not fetch mails.')  
	# get message ids in list
	message_ids = messages.split()

	# if there are messages
	if len(message_ids) > 0:
		# itterate over all messages
		for msg in message_ids:
			# get message
			ret,parts = conn.fetch(msg,'(RFC822)')  
			if ret != 'OK':  
				raise Exception('ERROR, fetching mail with id ' + str(msg))  
			# body part
			body = parts[1]
			# create mail object from raw mail
			mail = email.message_from_bytes(body)
			# extract some usefull mail headers
			mail_subject = mail.get('Subject')  
			# get sender email address
			mail_from = email.utils.parseaddr(mail.get('From'))[1]  
			# if from matches specified address ...
			if mail_from.lower() == MAILFROM.lower():
				print("INFO -> Processing new message from '" + mail_from + "' with subject: '" + mail_subject + "'")  
				print("Making post request ... ")  
				# payload for post request
				payload = {"fields":{"project":{"key":"TEST"},"summary":"REST ye merry gentlemen.","description":"Creating of an issue using project keys and issue type names using the REST API","issuetype":{"name":"Bug"}}}  
				# make post request with json data and basic authentication
				result = requests.post("http://localhost:8080/rest/api/2/issue/",json=payload,auth=('user', 'pass'))  
				# show result returned
				print("Result: " + result.text)  
				# mark mail as 'seen' 
				conn.store(msg,'+FLAGS','\\SEEN')  
	else:
		print('INFO -> No unseen messages in INBOX.')  
	# close connection
	conn.close()
	conn.logout()
except Exception as ex:
	exc_type, exc_obj, exc_tb = sys.exc_info()
	fname = os.path.split(exc_tb.tb_frame.f_code.co_filename)[1]
	print(exc_type, fname, exc_tb.tb_lineno)