Problems e-mailing in ver 0.7.24

[anne.oneemas]

Hello

Calibre was happily e-mailing news downloads to my Kindle 3 wifi every day, until I upgraded to Calibre version 0.7.24

Now, each time I attempt to send a document via my free.kindle.com account I get a fail notification with the following details:

ERROR: Failed to email books: Failed to email the following books:

name of publication here

(10054, 'An existing connection was forcibly closed by the remote host')
Traceback (most recent call last):
File "site-packages\calibre\gui2\device.py", line 634, in _send_mails
File "site-packages\calibre\utils\smtp.py", line 98, in sendmail
File "smtplib.py", line 612, in starttls
File "smtplib.py", line 363, in docmd
File "smtplib.py", line 337, in getreply
File "socket.py", line 406, in readline
error: [Errno 10054] An existing connection was forcibly closed by the remote host

Anybody got any suggestions? I get the same result whether I allow Calibre to automatically send the downloaded news or I manually connect/share.

Thanks

Anne