在带有python的virtualbox上使用网桥而不是NAT时发生SMTP错误

Question

我尝试在虚拟机（主机：win10，嘉宾：kde). 你知道吗

当虚拟机使用桥接网络时，我在下面的行中得到以下错误：

server = smtplib.SMTP('smtp.gmail.de', 587)


    File "/usr/lib/python3.5/smtplib.py", line 251, in __init__
    (code, msg) = self.connect(host, port)
  File "/usr/lib/python3.5/smtplib.py", line 335, in connect
    self.sock = self._get_socket(host, port, self.timeout)
  File "/usr/lib/python3.5/smtplib.py", line 306, in _get_socket
    self.source_address)
  File "/usr/lib/python3.5/socket.py", line 693, in create_connection
    for res in getaddrinfo(host, port, 0, SOCK_STREAM):
  File "/usr/lib/python3.5/socket.py", line 732, in getaddrinfo
    for res in _socket.getaddrinfo(host, port, family, type, proto, flags):
socket.gaierror: [Errno -3] Temporary failure in name resolution

将网络适配器更改回NAT时，我没有收到任何错误。你知道吗

有什么想法吗？你知道吗