有人能给我一些关于为什么这两者的见解：
mailServer = smtplib.SMTP("smtp.gmail.com", 587)
和这个：
mailServer = smtplib.SMTP('smtp.gmail.com:587')
是这样说的：
Traceback (most recent call last):
File "<pyshell#23>", line 1, in <module>
mailServer = smtplib.SMTP("smtp.gmail.com", 587)
File "C:\Users\user\Documents\Shuttlecock_new\python\lib\smtplib.py", line 242, in __init__
(code, msg) = self.connect(host, port)
File "C:\Users\user\Documents\Shuttlecock_new\python\lib\smtplib.py", line 302, in connect
self.sock = self._get_socket(host, port, self.timeout)
File "C:\Users\user\Documents\Shuttlecock_new\python\lib\smtplib.py", line 277, in _get_socket
return socket.create_connection((port, host), timeout)
File "C:\Users\user\Documents\Shuttlecock_new\python\lib\socket.py", line 571, in create_connection
raise err
error: [Errno 10060] A connection attempt failed because the connected party did not properly respond …