这篇文章主要介绍了Python基于smtplib实现异步发送邮件服务,需要的朋友可以参考下
基于smtplib包制作而成,但在实践中发现一个不知道算不算是smtplib留的一个坑,在网络断开的情况下发送邮件时会抛出一个socket.gaierror的异常,但是smtplib中并没有捕获这个异常,导致程序会因这个异常终止,因此代码中针对这部分的异常进行处理,确保不会异常终止。
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 #!/usr/bin/env python # -*- coding: utf-8 -*- __author__ = 'Zoa Chou' # see http://www.mudoom.com/Article/show/id/29.html for detail import logging import smtplib import mimetypes import socket from email import encoders from email.header import Header from email.mime.text import MIMEText, MIMENonMultipart from email.mime.base import MIMEBase from email.utils import parseaddr, formataddr class Mailer(object): def __init__(self): pass def send_mail(self, smtp_server, from_address, to_address, subject, body, files=None): """ 发送邮件主程序 :param smtp_server: dict 邮件服务器设置 :keyword host: string smtp服务器地址 :keyword port: int smtp服务器端口号 :keyword user: string 用户名 :keyword passwd: string 密码 :keyword ssl: bool 是否启用ssl,默认False :keyword timeout: int 超时时间,默认10s :param from_address: 发件人邮箱 :param to_address: 收件人邮箱 :param subject: 邮件标题 :param body: 邮件内容 :param files: 附件 :raise: NetworkError/MailerException """ # 格式化邮件内容 body = self._encode_utf8(body) # 邮件类型 content_type = 'html' if body.startswith('<html>') else 'plain' msg = MIMENonMultipart() if files else MIMEText(body, content_type, 'utf-8') # 格式化邮件数据 msg['From'] = self._format_address(from_address) msg['To'] = ', '.join(self._format_list(to_address)) msg['subject'] = self._encode_utf8(subject) # 构造附件数据 if files: msg.attach(MIMEText(body, content_type, 'utf-8')) cid = 0 for file_name, payload in files: file_name = self._encode_utf8(file_name) main_type, sub_type = self._get_file_type(file_name) if hasattr(payload, 'read'): payload = payload.read() f_name = self._encode_header(file_name) mime = MIMEBase(main_type, sub_type, filename=f_name) mime.add_header('Content-Disposition', 'attachment', filename=f_name) mime.add_header('Content-ID', '<%s>' % cid) mime.add_header('X-Attachment-Id', '%s' % cid) mime.set_payload(payload) encoders.encode_base64(mime) msg.attach(mime) cid += 1 host = smtp_server.get('host') port = smtp_server.get('port') user = smtp_server.get('user') passwd = smtp_server.get('passwd') ssl = smtp_server.get('ssl', False) time_out = smtp_server.get('timeout', 10) # 没有输入端口则使用默认端口 if port is None or port == 0: if ssl: port = 465 else: port = 25 logging.debug('Send mail form %s to %s' % (msg['From'], msg['To'])) try: if ssl: # 开启ssl连接模式 server = smtplib.SMTP_SSL('%s:%d' % (host, port), timeout=time_out) else: server = smtplib.SMTP('%s:%d' % (host, port), timeout=time_out) # 开启调试模式 # server.set_debuglevel(1) # 如果存在用户名密码则尝试登录 if user and passwd: server.login(user, passwd)