poplibで利用したメール受信

# coding: utf-8

import time
import poplib
import email
from email.header import decode_header

# ヘッダ情報取得
def get_header(msg, name):
	header = ''
	if msg[name]:
		for tup in decode_header(str(msg[name])):
			if type(tup[0]) is bytes:
				charset = tup[1]
				if charset:
					header += tup[0].decode(tup[1])
				else:
					header += tup[0].decode()
			elif type(tup[0]) is str:
					header += tup[0]
	return header

# 受信日時
def get_date(msg):
	mdate = email.utils.parsedate(msg.get('date'))
	return time.strftime('%Y/%m/%d %H:%M:%S', mdate)

# body情報
def get_content(msg):
	if msg.is_multipart() is True:
		rst = ""
		for part in msg.walk():
			payload = part.get_payload(decode=True)
			if payload is None:
				continue
			charset = part.get_content_charset()
			if charset is not None:
				payload = payload.decode(charset, "ignore")
			rst += str(payload)
		return rst
	else:
		charset = msg.get_content_charset()
		payload = msg.get_payload(decode=True)
		try:
			if payload:
				if charset:
					return payload.decode(charset)
				else:
					return payload.decode()
			else:
				return ""
		except:
			return payload

# サーバに接続
cli = poplib.POP3('www.example.com')

# 認証
cli.user('ユーザID')
cli.pass_('パスワード')

# メールボックス内のメールの総数を取得
count = cli.stat()[0]

for i in range(count):
	no = i + 1
	content = cli.retr(no)[1]
	msg = email.message_from_bytes(b'\r\n'.join(content))

	print(get_header(msg, 'from'))
	print(get_header(msg, 'subject'))
	print(get_date(msg))
	print(get_content(msg))

	# 削除
	# cli.dele(no)