Calibre - Kindle HD Error Message

[tschu185]

Calibre is not sending my newspapers and magazines to my Kindle HD. I get a "Fail to Email" Message. Any advice on how to correct? When I click on the error info I get the following. Greek to me.

calibre, version 1.8.0 (win32, isfrozen: True)
Failed to email book: Failed: Email The Economist to tschu185@kindle.com

Starting job: Email The Economist to tschu185@kindle.com

Sending failed...

Traceback (most recent call last):
File "site-packages\calibre\gui2\email.py", line 43, in run
File "site-packages\calibre\gui2\email.py", line 124, in sendmail
File "site-packages\calibre\utils\smtp.py", line 94, in sendmail
File "site-packages\calibre\utils\smtp.py", line 86, in sendmail_direct
IOError: Failed to send mail: error(10013, 'An attempt was made to access a socket in a way forbidden by its access permissions')


Retrying in 1 seconds...

Waiting 1 seconds before sending, to avoid being marked as spam.
You can control this delay via Preferences->Tweaks

Sending failed...

Traceback (most recent call last):
File "site-packages\calibre\gui2\email.py", line 43, in run
File "site-packages\calibre\gui2\email.py", line 124, in sendmail
File "site-packages\calibre\utils\smtp.py", line 94, in sendmail
File "site-packages\calibre\utils\smtp.py", line 86, in sendmail_direct
IOError: Failed to send mail: SMTPServerDisconnected('Connection unexpectedly closed',)

Job: "Email The Economist to tschu185@kindle.com" failed with error:
Traceback (most recent call last):
File "site-packages\calibre\gui2\threaded_jobs.py", line 83, in start_work
File "site-packages\calibre\gui2\email.py", line 98, in __call__
IOError: Failed to send mail: SMTPServerDisconnected('Connection unexpectedly closed',)

Called with args: (u'C:\\Users\\Owner\\AppData\\Local\\Temp\\calibre _2ugc6c\\tcxvdycaltmpfmt.mobi', u'The Economist.mobi', u'tschu185@kindle.com', u'News: The Economist', u'Attached is the The Economist periodical downloaded by calibre.') {u'notifications': <Queue.Queue instance at 0x08684800>, u'abort': <threading._Event object at 0x096063D0>, u'log': <calibre.utils.logging.GUILog object at 0x096062F0>}