Anybody else having problem *sending* mail to this list?

[Gerhard Häring]

On my mailserver (running a recent Postfix snapshot) I get this since a 
few hours:

mylene:/var# mailq
-Queue ID- --Size-- ----Arrival Time---- -Sender/Recipient-------
DA10713E37     1617 Wed Sep  3 11:32:46  gh at ghaering.de
(lost connection with mail.python.org[12.155.117.29] while sending end 
of data -- message may be sent more than once)
                                          python-list at python.org

However, using telnet to send mail to python-list on mail.python.org 
from the same host seems to work fine.

Is there something strange going on?

-- Gerhard