python实现邮件接收、附件下载

import smtplib
from email import encoders
from email.header import Header
from email.mime.text import MIMEText
from email.utils import parseaddr, formataddr

def send_email(from_addr, to_addr, subject, password):
    msg = MIMEText("邮件正文",'html','utf-8')
    msg['From'] = u'<%s>' % from_addr
    msg['To'] = u'<%s>' % to_addr
    msg['Subject'] = subject

    smtp = smtplib.SMTP_SSL('smtp.163.com', 465)
    smtp.set_debuglevel(1)
    smtp.ehlo("smtp.163.com")
    smtp.login(from_addr, password)
    smtp.sendmail(from_addr, [to_addr], msg.as_string())

if __name__ == "__main__":
    # 这里的密码是开启smtp服务时输入的客户端登录授权码，并不是邮箱密码
    # 现在很多邮箱都需要先开启smtp才能这样发送邮件
    send_email(u"from_addr",u"to_addr",u"主题",u"password")

from poplib import POP3

p = POP3('pop.163.com')
p.user('xxxxxxx@163.com')
p.pass_('xxxxxxxx')

p.stat()
...
p.quit()

import getpass, imaplib

M = imaplib.IMAP4()
M.login(getpass.getuser(), getpass.getpass())
M.select()
typ, data = M.search(None, 'ALL')
for num in data[0].split():
    typ, data = M.fetch(num, '(RFC822)')
    print 'Message %s\n%s\n' % (num, data[0][1])
M.close()
M.logout()

# -*- coding: utf-8 -*-
import poplib,email,telnetlib
import datetime,time,sys,traceback
from email.parser import Parser
from email.header import decode_header
from email.utils import parseaddr


class down_email():

    def __init__(self,user,password,eamil_server):
        # 输入邮件地址, 口令和POP3服务器地址:
        self.user = user
        # 此处密码是授权码,用于登录第三方邮件客户端
        self.password = password
        self.pop3_server = eamil_server

    # 获得msg的编码
    def guess_charset(self,msg):
        charset = msg.get_charset()
        if charset is None:
            content_type = msg.get('Content-Type', '').lower()
            pos = content_type.find('charset=')
            if pos >= 0:
                charset = content_type[pos + 8:].strip()
        return charset

    #获取邮件内容
    def get_content(self,msg):
        content=''
        content_type = msg.get_content_type()
        # print('content_type:',content_type)
        if content_type == 'text/plain': # or content_type == 'text/html'
            content = msg.get_payload(decode=True)
            charset = self.guess_charset(msg)
            if charset:
                content = content.decode(charset)
        return content

    # 字符编码转换
    # @staticmethod
    def decode_str(self,str_in):
        value, charset = decode_header(str_in)[0]
        if charset:
            value = value.decode(charset)
        return value

    # 解析邮件,获取附件
    def get_att(self,msg_in, str_day):
        attachment_files = []
        for part in msg_in.walk():
            # 获取附件名称类型
            file_name = part.get_param("name")  # 如果是附件，这里就会取出附件的文件名
            # file_name = part.get_filename() #获取file_name的第2中方法
            # contType = part.get_content_type()
            if file_name:
                h = email.header.Header(file_name)
                # 对附件名称进行解码
                dh = email.header.decode_header(h)
                filename = dh[0][0]
                if dh[0][1]:
                    # 将附件名称可读化
                    filename = self.decode_str(str(filename, dh[0][1]))
                    # print(filename)
                    # filename = filename.encode("utf-8")
                # 下载附件
                data = part.get_payload(decode=True)
                # 在指定目录下创建文件，注意二进制文件需要用wb模式打开
                att_file = open('./test/' + filename, 'wb')
                att_file.write(data)  # 保存附件
                att_file.close()
                attachment_files.append(filename)
            else:
                # 不是附件，是文本内容
                print(self.get_content(part))
                # # 如果ture的话内容是没用的
                # if not part.is_multipart():
                #     # 解码出文本内容，直接输出来就可以了。
                #     print(part.get_payload(decode=True).decode('utf-8'))

        return attachment_files

    def run_ing(self):
        str_day = str(datetime.date.today())# 日期赋值
        # 连接到POP3服务器,有些邮箱服务器需要ssl加密，可以使用poplib.POP3_SSL
        try:
            telnetlib.Telnet(self.pop3_server, 995)
            self.server = poplib.POP3_SSL(self.pop3_server, 995, timeout=10)
        except:
            time.sleep(5)
            self.server = poplib.POP3(self.pop3_server, 110, timeout=10)

        # server.set_debuglevel(1) # 可以打开或关闭调试信息
        # 打印POP3服务器的欢迎文字:
        print(self.server.getwelcome().decode('utf-8'))
        # 身份认证:
        self.server.user(self.user)
        self.server.pass_(self.password)
        # 返回邮件数量和占用空间:
        print('Messages: %s. Size: %s' % self.server.stat())
        # list()返回所有邮件的编号:
        resp, mails, octets = self.server.list()
        # 可以查看返回的列表类似[b'1 82923', b'2 2184', ...]
        print(mails)
        index = len(mails)
        for i in range(index, 0, -1):# 倒序遍历邮件
        # for i in range(1, index + 1):# 顺序遍历邮件
            resp, lines, octets = self.server.retr(i)
            # lines存储了邮件的原始文本的每一行,
            # 邮件的原始文本:
            msg_content = b'\r\n'.join(lines).decode('utf-8')
            # 解析邮件:
            msg = Parser().parsestr(msg_content)
            #获取邮件的发件人，收件人， 抄送人,主题
            # hdr, addr = parseaddr(msg.get('From'))
            # From = self.decode_str(hdr)
            # hdr, addr = parseaddr(msg.get('To'))
            # To = self.decode_str(hdr)
            # 方法2：from or Form均可
            From = parseaddr(msg.get('from'))[1]
            To = parseaddr(msg.get('To'))[1]
            Cc=parseaddr(msg.get_all('Cc'))[1]# 抄送人
            Subject = self.decode_str(msg.get('Subject'))
            print('from:%s,to:%s,Cc:%s,subject:%s'%(From,To,Cc,Subject))
            # 获取邮件时间,格式化收件时间
            date1 = time.strptime(msg.get("Date")[0:24], '%a, %d %b %Y %H:%M:%S')
            # 邮件时间格式转换
            date2 = time.strftime("%Y-%m-%d",date1)
            if date2 < str_day:
                break # 倒叙用break
                # continue # 顺叙用continue
            else:
                # 获取附件
                attach_file=self.get_att(msg,str_day)
                print(attach_file)

        # 可以根据邮件索引号直接从服务器删除邮件:
        # self.server.dele(7)
        self.server.quit()


if __name__ == '__main__':
    #把打印内容输出到文件
    # origin = sys.stdout
    # f = open('./test/log.txt', 'w')
    # sys.stdout = f
    try:
        # 输入邮件地址, 口令和POP3服务器地址:
        user = '8284@163.com'
        # 此处密码是授权码,用于登录第三方邮件客户端
        password = '8284'
        eamil_server = 'pop.163.com'
        # user='xinfei@.com'
        # password = 'f67h2'
        # eamil_server = 'pop.exmail.qq.com'
        email_class=down_email(user=user,password=password,eamil_server=eamil_server)
        email_class.run_ing()
    except Exception as e:
        import traceback
        ex_msg = '{exception}'.format(exception=traceback.format_exc())
        print(ex_msg)
        # traceback.print_exc()
    # sys.stdout = origin
    # f.close()

server = poplib.POP3(pop3_server, 110, timeout=10)
or 
server = poplib.POP3_SSL(pop3_server, 995, timeout=10)

for part in msg.walk():
        # 如果ture的话内容是没用的
        if not part.is_multipart():            
            print(part.get_payload(decode=True).decode('utf-8')) 
            # 解码出文本内容，直接输出来就可以了。