diff --git a/Lib/poplib.py b/Lib/poplib.py
index 23c0b46..0525043 100644
--- a/Lib/poplib.py
+++ b/Lib/poplib.py
@@ -97,7 +97,7 @@
 
     def _putline(self, line):
         if self._debugging > 1: print '*put*', `line`
-        self.sock.send('%s%s' % (line, CRLF))
+        self.sock.sendall('%s%s' % (line, CRLF))
 
 
     # Internal: send one command to the server (through _putline())