Possible Clues:

• Post distribution point
• Where a man or woman of letters works?
• Here are the ins and outs of a large office
• Lowest rung on the corporate ladder, stereotypically
• Start to make trouble over space in sorting office
• Office's letter center
• Man flu, old style, you could say, post operations here
• Stereotypical starting job assignment at a corporation
• Letter getter
• Place for things to get sorted out