socket.gaierror：[Errno 11001] getaddrinfo失败

Question

我尝试使用python将文件附加到邮件。码：

import smtplib
from email.MIMEMultipart import MIMEMultipart
from email.MIMEText import MIMEText
from smtplib import SMTPException


def send_Email():
    file1="abc.txt"
    message = "Test mail"
    msg = MIMEMultipart()

    msg.attach(MIMEText(file(file1).read()))

    try:
        smtpObj = smtplib.SMTP('smtp server name',port)
        smtpObj.sendmail(sender, EmailId, message, msg.as_string() )
        print "Successfully sent email"
    except SMTPException:
        print "Error: unable to send email"

我得到的错误是：socket.gaierror：[Errno 11001] getaddrinfo失败

完整的错误消息：

 File "C:\Python27\lib\smtplib.py", line 249, in __init__
    (code, msg) = self.connect(host, port)
  File "C:\Python27\lib\smtplib.py", line 309, in connect
    self.sock = self._get_socket(host, port, self.timeout)
  File "C:\Python27\lib\smtplib.py", line 284, in _get_socket
    return socket.create_connection((port, host), timeout)
  File "C:\Python27\lib\socket.py", line 553, in create_connection
    for res in getaddrinfo(host, port, 0, SOCK_STREAM):
socket.gaierror: [Errno 11001] getaddrinfo failed

Answer 1

问题是“ smtp服务器名称”的DNS查找失败-如果这是您的确切代码，则可以看到原因-如果没有，并且您具有SMTP服务器的有效合格名称，则防火墙/ Internet连接等，端口也必须设置为有效值以匹配服务器的SMTP配置（通常为端口25，但并非始终如此）。

Answer 2

我肯定知道从后台代理工作时会出现gaierror。