Python 通过 SMTP 直接投递邮件

邮件发送

发送邮件的Python代码示例

import smtplib
from email.header import Header
from email.mime.text import MIMEText

import dns.resolver

server_email = 'system@server.com'
user_email = 'user@demo.com'

message = MIMEText('服务器自动发出')
message['Subject'] = Header('通知邮件').encode()
message['From'] = f'System Notice<{server_email}>'
message['To'] = user_email

user_domain = user_email.split('@')[1]
user_mx = dns.resolver.query(user_domain, 'MX')
user_server = user_mx[0].exchange.to_text()
_server = smtplib.SMTPE(user_server)
res = _server.send_message(message, server_email, user_email)
print('发送失败' if res else '发送成功')

设置发送方策略框架

设置server.com的MX记录和TXT记录

MX mail.server.com
TXT v=spf1 mx -all

设置mail.server.com的A记录为服务器地址

A ***.***.***.***