[daffy4u]

Here's what I get now:

C:\>calibre-smtp -vv debXXX@gmail.com XXX@kindle.com "test email"
connect: ('smtp-fw-9101.amazon.com.', 25)
connect: (25, 'smtp-fw-9101.amazon.com.')
reply: '554-smtp-fw-9101.amazon.com\r\n'
reply: '554 SBRS score too low: http://www.senderbase.org/\r\n'
reply: retcode (554); Msg: smtp-fw-9101.amazon.com
SBRS score too low: http://www.senderbase.org/
connect: smtp-fw-9101.amazon.com
SBRS score too low: http://www.senderbase.org/
send: 'ehlo DebXXX-PC.myhome.westell.com\r\n'
connect: ('smtp-fw-2101.amazon.com.', 25)
connect: (25, 'smtp-fw-2101.amazon.com.')
reply: '554-smtp-fw-2101.amazon.com\r\n'
reply: '554 SBRS score too low: http://www.senderbase.org/\r\n'
reply: retcode (554); Msg: smtp-fw-2101.amazon.com
SBRS score too low: http://www.senderbase.org/
connect: smtp-fw-2101.amazon.com
SBRS score too low: http://www.senderbase.org/
send: 'ehlo DebXXX-PC.myhome.westell.com\r\n'
connect: ('smtp-fw-4101.amazon.com.', 25)
connect: (25, 'smtp-fw-4101.amazon.com.')
reply: '554-smtp-fw-4101.amazon.com\r\n'
reply: '554 SBRS score too low: http://www.senderbase.org/\r\n'
reply: retcode (554); Msg: smtp-fw-4101.amazon.com
SBRS score too low: http://www.senderbase.org/
connect: smtp-fw-4101.amazon.com
SBRS score too low: http://www.senderbase.org/
send: 'ehlo DebXXX-PC.myhome.westell.com\r\n'
Traceback (most recent call last):
  File "smtp.py", line 67, in sendmail_direct
  File "smtplib.pyo", line 685, in sendmail
  File "smtplib.pyo", line 509, in ehlo_or_helo_if_needed
  File "smtplib.pyo", line 383, in ehlo
  File "smtplib.pyo", line 340, in getreply
SMTPServerDisconnected: Connection unexpectedly closed

Traceback (most recent call last):
  File "smtp.py", line 239, in <module>
  File "smtp.py", line 216, in main
  File "smtp.py", line 81, in sendmail
  File "smtp.py", line 73, in sendmail_direct
IOError: Failed to send mail: SMTPServerDisconnected('Connection unexpectedly closed',)