title: How to search specific e-mail using python imaplib.IMAP4.search()
body: <pre><code> import imaplib,time
   T=time.time()
   M=imaplib.IMAP4_SSL("imap.gmail.com")
   M.login(user,psw)
   M.select() 
   typ, data = M.search(None, 'UNSEEN SINCE T')
   for num in string.split(data[0]):
      try :
         typ, data=M.fetch(num,'(RFC822)')
         msg=email.message_from_string(data[0][1])
         print msg["From"]
         print msg["Subject"]  
         print msg["Date"]  
     except Exception,e:
        print "hello world"
  M.close()
  M.logout()
  </code></pre>
  
  <p>ERROR:</p>
  
  <pre><code>Traceback (most recent call last):
  File "mail.py", line 37, in &lt;module&gt;
   typ, data = M.search(None, 'UNSEEN SINCE T')
   File "/usr/lib/python2.7/imaplib.py", line 627, in search
   typ, dat = self._simple_command(name, *criteria)
   File "/usr/lib/python2.7/imaplib.py", line 1070, in _simple_command
   return self._command_complete(name, self._command(name, *args))
   File "/usr/lib/python2.7/imaplib.py", line 905, in _command_complete
   raise self.error('%s command error: %s %s' % (name, typ, data))
   imaplib.error: SEARCH command error: BAD ['Parse command error']
  </code></pre>
  
  <p>I want to search e-mail since a specific time . Here is my code .But it runs error.Can you give me some advice on how to solve it.thanks a lot!</p>