The author of the opinion-page article, "Let's Put 'Service' Back in Postal Service," Nov. 12, writes well about his concern for better service from the United States Postal Service. Here's another problem: In our town of 1,200 we are not provided home delivery. We must go to the post office and pick up our mail.We compensate the Postal Service for their lack of service by paying rent on our box at the post office. There is still free delivery in cities and rural areas, but no free delivery in this small town. Is it right that we have to pay for this deficiency? Earl H. Byleen, Stromsburg, Neb. Letters are welcome. Only a selection can be published, subject to condensation, and none acknowledged. Please address them to "Readers Write," One Norway St., Boston, MA 02115.