IN PROGRESS - issue KAZOO-2105: smtp to fax 
https://2600hz.atlassian.net/browse/KAZOO-2105
handle the case when haproxy is checking server availability
IN PROGRESS - issue KAZOO-2105: smtp to fax 
https://2600hz.atlassian.net/browse/KAZOO-2105
receives mail message and creates fax job
IN PROGRESS - issue KAZOO-2105: smtp to fax 
https://2600hz.atlassian.net/browse/KAZOO-2105
process optional document as attachment in fax job doc
IN PROGRESS - issue KAZOO-2105: smtp to fax 
https://2600hz.atlassian.net/browse/KAZOO-2105
start smtp listener
IN PROGRESS - issue KAZOO-2105: smtp to fax 
https://2600hz.atlassian.net/browse/KAZOO-2105
honor Outbound-Call-ID in originate
KAZOO-2105 tweaks
KAZOO-2105 handle PROXY messages
KAZOO-2105 formatting
KAZOO-2105 more formatting
KAZOO-2105: spec updates, formatting, and more!