Spring 2014 Do It Best Market Mail Boss is wrapping up the Spring Do It Best Market today in Indianapolis. Here is Account Manager Scott in Epoch Design Booth 4237 at the Indianapolis Convention Center. Mail Boss is a Do It Best vendor of locking security mailboxes. For more information on becoming a Mail Boss dealer, go here. Mail Boss Mail Boss is an innovative leader in USPS approved security mailboxes, launched in 2006 as a division of Epoch Design, LLC, a family-owned business based in Redmond, WA.