The plugin is not working. What happened?
This shows up in my spam folder:
Mail delivery failed: returning message to sender
This message was created automatically by mail delivery software.
A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed
SMTP error from remote mail server after end of data...
Messages are not being sent and I am unable to answer messages due to errors.