email_smtp.py

# -*- coding: utf-8 -*-

# 用于调用 smtp 协议发送邮件

import smtplib
import mimetypes
from email import encoders
from email.header import Header
from email.mime.text import MIMEText
from email.mime.multipart import MIMEMultipart
from email.mime.base import MIMEBase
from email.utils import parseaddr, formataddr

def _format_addr(s):
    name, addr = parseaddr(s)
    return formataddr((Header(name, 'utf-8').encode(), addr))


from_addr = 'test'
to_addr = from_addr
password = 'test'
smtp_server = 'mail.customs.gov.cn'

msg = MIMEMultipart()
msg['From'] = _format_addr('自定义发送方…… <%s>' % from_addr)
msg['To'] = _format_addr('自定义接收方…… <%s>' % to_addr)
msg['Subject'] = Header('测试……', 'utf-8').encode()

# 邮件正文是MIMEText:
msg.attach(MIMEText('测试带附件……', 'plain', 'utf-8'))

attach_file = '新建 Microsoft Excel 工作表.xlsx'
# 添加附件就是加上一个MIMEBase，从本地读取一个图片:
with open(attach_file, 'rb') as f:
    # 设置附件的MIME和文件名，这里是png类型:
    contype, encoding = mimetypes.guess_type(attach_file)
    if contype is None or encoding is not None:
        contype = 'application/octet-stream'  # default MIME type
    maintype, subtype = contype.split('/')
    att = MIMEBase(maintype,subtype)
    mime = MIMEBase(contype, 'xlsx', filename=attach_file)
    # 加上必要的头信息:
    mime.add_header('Content-Disposition', 'attachment', filename=attach_file)
    mime.add_header('Content-ID', '<0>')
    mime.add_header('X-Attachment-Id', '0')
    # 把附件的内容读进来:
    mime.set_payload(f.read())
    # 用Base64编码:
    encoders.encode_base64(mime)
    # 添加到MIMEMultipart:
    msg.attach(mime)

server = smtplib.SMTP(smtp_server, 25)
server.set_debuglevel(1)
server.login(from_addr, password)
server.sendmail(from_addr, [to_addr], msg.as_string())
server.quit()