[shoelesshunter]

I have been using Calibre, much to my great joy, with my new Kindle Voyage. All was going well until yesterday when email jobs began to fail with the following errors:

Traceback (most recent call last):
File "site-packages/calibre/gui2/email.py", line 43, in run
File "site-packages/calibre/gui2/email.py", line 130, in sendmail
File "site-packages/calibre/utils/smtp.py", line 116, in sendmail
File "site-packages/calibre/utils/smtp.py", line 108, in sendmail_direct
IOError: Failed to send mail: error(110, 'Connection timed out')

I have double checked my email settings and I can manually email to the Kindle from my gmail account, however Calibre fails to do this suddenly.

I am using 64-bit Debian 8.3 with the Calibre 2.52.0