| P.O. pile |
| P.O. stack |
| USPS items |
| Mail abbr. |
| P.O. items |
| P.O. boxful |
| USPS pieces |
| P.O. sackful |
| Posts: Abbr. |
| G.P.O. items |
| Env. inserts |
| POB contents |
| USPS delivery |
| Env. contents |
| Monogram pts. |
| PO Box fillers |
| Wd. components |
| USPS deliveries |
| Alphabet: Abbr. |
| P.O. box filler |
| PO Box contents |
| Brief missives? |
| P.O. deliveries |
| P.O. box inserts |
| Fillers of envs. |
| A, B and C: Abbr. |
| A, b, etc.: Abbr. |
| What P.O.'s handle |
| Harbor ships: Abbr. |
| Items in a P.O. box |
| A, B and C, briefly |
| A and P, e.g.: Abbr. |
| Acronym parts: Abbr. |
| Corp. communications |
| P and L, e.g.: Abbr. |
| Posted pieces: Abbr. |
| Some paperwork: Abbr. |
| U.S.P.S. cargo: Abbr. |
| Monogram units: Abbr. |
| Athletic rewards: Abbr. |
| Crossword fodder: Abbr. |
| Office corr., sometimes |
| Items in mailboxes: Abbr. |
| Alphabet components: Abbr. |
| Contents of many files: Abbr. |
| Serious dating, in personal ads |
| Contents of some envelopes: Abbr. |
| Predecessors of much email: Abbr. |
| There are 185 in this puzzle: Abbr. |
| Post office deliveries that might have "forever" stamps on them: Abbr. |