python发送邮件554DT:SPM已解决

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说明：本例使用163邮箱

一、报错信息

使用SMTP发送邮件遇到以下报错：

554, b'DT:SPM 163 smtp10,DsCowACXeOtmjRRdsY8aCw--.21947S2 1561628007,please see http://mail.163.com/help/help_spam_16.htm?ip=36.110.94.251&hostid=smtp10&time=1561628007'

二、排查原因

1.检查163邮箱是否设置授权码，授权码对不对。不对会报错： 535, b'Error: authentication failed'

2.检查代码邮件格式规范

下面贴出菜鸟教程部分代码使用header。看已发送邮件的确是显示了发件人别名（显示代发），收件人看到的发件人也是自己起的别名。如下图：

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

# Nola

import smtplib

from email.mime.text import MIMEText

from email.header import Header

import time

mail_server = "smtp.163.com"

mail_port = 25

sender = "xxxxx@163.com"

sender_password = "xxxxxx"  # 授权码

receivers = "wewewwe@163.com"

message = MIMEText('Python邮件发送测试...', 'plain', 'utf-8')

# message['From'] = sender

# message['To'] = receivers

message['From'] = Header("菜鸟教程", 'utf-8')

message['To'] = Header("测试", 'utf-8')

send_time = time.strftime('%Y-%m-%d %H:%M:%S',time.localtime(time.time()))

subject = '邮件测试' + send_time

message['Subject'] = subject

try:

    smtp_obj = smtplib.SMTP()

    smtp_obj.connect(mail_server, mail_port)

    smtp_obj.login(sender, sender_password)

    smtp_obj.sendmail(sender, [receivers], message.as_string())

    print('success!')

except smtplib.SMTPException as e:

    print('failure!')

    print(e)

重点是：收到几封邮件后，收不到了，换收件人也收不到，猜测是163禁发了。点上图中帮助可以看到下图，所以善意的伪装也会产生误会。

三、解决方法

From和To使用发件人和收件人真实邮箱地址 ，发送即可成功。

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

# Nola

import smtplib

from email.mime.text import MIMEText

import time

mail_server = "smtp.163.com"

mail_port = 25

sender = "xxxxx@163.com"

sender_password = "xxxxxx"  # 授权码

receivers = "wewewwe@163.com"

message = MIMEText('Python邮件发送测试...', 'plain', 'utf-8')

message['From'] = sender

message['To'] = receivers

send_time = time.strftime('%Y-%m-%d %H:%M:%S',time.localtime(time.time()))

subject = '邮件测试' + send_time

message['Subject'] = subject

try:

    smtp_obj = smtplib.SMTP()

    smtp_obj.connect(mail_server, mail_port)

    smtp_obj.login(sender, sender_password)

    smtp_obj.sendmail(sender, [receivers], message.as_string())

    print('success!')

except smtplib.SMTPException as e:

    print('failure!')

    print(e)