Can't email news (or books)

[poemi]

Just installed Calibre yesterday and everything but email is great so far. I've read the other email threads here, tweaked everything imaginable on my AV program, my software firewall, and my router, with no luck.

Had the same problem with 0.7.33 and 0.7.34. This is on Win XP. Here's my error log:
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ERROR: Failed to email book: <b>Failed</b>: Email The Economist to XXXXXX@kindle.com

Email The Economist to XXXXXX@kindle.com

Sending failed...
Traceback (most recent call last):
File "site-packages\calibre\gui2\email.py", line 116, in run
File "site-packages\calibre\gui2\email.py", line 170, in sendmail
File "site-packages\calibre\utils\smtp.py", line 91, in sendmail
File "site-packages\calibre\utils\smtp.py", line 83, in sendmail_direct
IOError: Failed to send mail: SMTPServerDisconnected('Connection unexpectedly closed',)

Retrying in 1 seconds...

Sending failed...
Traceback (most recent call last):
File "site-packages\calibre\gui2\email.py", line 116, in run
File "site-packages\calibre\gui2\email.py", line 170, in sendmail
File "site-packages\calibre\utils\smtp.py", line 91, in sendmail
File "site-packages\calibre\utils\smtp.py", line 83, in sendmail_direct
IOError: Failed to send mail: SMTPServerDisconnected('Connection unexpectedly closed',)

[kovidgoyal]

Use a free gmail account to send mail. many mail servers do no accept mail from random computers.

[poemi]

Thanks--hotmail didn't work but gmail did!