nother attempt to add more logging and fix wallace messages not being delivered and staying in spool directory
Summary: Adding more logs that should show why _sendmail function does not start a "while" delivery loop and unliking file does not happen. Also some code polishing.
Test Plan: none
Reviewers: machniak, vanmeeuwen
Reviewed By: machniak
Differential Revision: https://git.kolab.org/D599