def archive_message(groupName, msgNumber, depth=0):
	global failed
	failed = False
	s = requests.Session()
	resp = s.get('https://groups.yahoo.com/api/v1/groups/' + groupName + '/messages/' + str(msgNumber) + '/raw', cookies={'T': cookie_T, 'Y': cookie_Y})
	if resp.status_code != 200:
		#some other problem, perhaps being refused access by Yahoo?
		#retry for a max of 3 times anyway
		if depth < 3:
			print ("Cannot get message " + str(msgNumber) + ", attempt " + str(depth+1) + " of 3 due to HTTP status code " + str(resp.status_code))
			time.sleep(0.1)
			archive_message(groupName,msgNumber,depth+1)
		else:
			if resp.status_code == 500:
				#we are most likely being blocked by Yahoo
				log("Archive halted - it appears Yahoo has blocked you.", groupName)
				log("Check if you can access the group's homepage from your browser. If you can't, you have been blocked.", groupName)
				log("Don't worry, in a few hours (normally less than 3) you'll be unblocked and you can run this script again - it'll continue where you left off." ,groupName)
				sys.exit()
			log("Failed to retrive message " + str(msgNumber) + " due to HTTP status code " + str(resp.status_code), groupName )
			failed = True
	
	if failed == True:
		return False
	
	msgJson = resp.text
	writeFile = open((groupName + "/" + str(msgNumber) + ".json"), "wb")
	writeFile.write(msgJson.encode('utf-8'))
	writeFile.close()
	return True