diff -r e948154af406 Lib/smtplib.py
--- a/Lib/smtplib.py	Sat Apr 13 18:00:04 2013 +0300
+++ b/Lib/smtplib.py	Sat Apr 13 12:45:54 2013 -0400
@@ -222,12 +222,14 @@
         If specified, `host' is the name of the remote host to which to
         connect.  If specified, `port' specifies the port to which to connect.
         By default, smtplib.SMTP_PORT is used.  An SMTPConnectError is raised
-        if the specified `host' doesn't respond correctly.  If specified,
-        `local_hostname` is used as the FQDN of the local host.  By default,
-        the local hostname is found using socket.getfqdn(). The
-        `source_address` parameter takes a 2-tuple (host, port) for the socket
-        to bind to as its source address before connecting. If the host is ''
-        and port is 0, the OS default behavior will be used.
+        if the specified `host' has a failure at the protocol level, and an
+        IOError is raised by the underlying socket if there are errors
+        at the network level. If specified, `local_hostname` is used as the FQDN
+        of the local host.  By default, the local hostname is found using
+        socket.getfqdn(). The `source_address` parameter takes a 2-tuple
+        (host, port) for the socket to bind to as its source address before
+        connecting. If the host is '' and port is 0, the OS default behavior
+        will be used.
 
         """
         self.timeout = timeout