What is the general history of the US postal "business reply mail" ? When did it begin? [more inside]
posted by Quarter Pincher on May 3, 2012 - 2 answers

Can I put a penny stamp on my already-printed metered letters? [more inside]
posted by anthropophagous on Jan 26, 2012 - 3 answers

I have perfected homemade marshmallows and they are delicious! They are so delicious that I want to send some from San Francisco to a friend in England. The only trouble is that the marshmallows have a coating of white powder (confectioners' sugar and a little cornflour) to ensure they don't stick together and create one big mess. Am I asking for trouble by sending this stuff via USPS internationally? [more inside]
posted by RosiePosie on Jan 3, 2012 - 9 answers

I have a large stamp collection that has postage stamps from around 1920 or so through the present (mostly 1920s through 1950s), mostly U.S. but some foreign as well. Most stamps came off mail and are in an album. Some have postmarks, some don't. I live in Boston and would like to take the collection in person to a dealer who won't rip me off, but I'm open to other alternatives too.
posted by scottso17 on Jun 9, 2010 - 7 answers

If I send a postcard from China to the United States, I pay 4.5 RMB. Who gets the money? [more inside]
posted by jweed on Apr 9, 2010 - 7 answers

Can I put two Forever stamps on one envelope? [more inside]
posted by AlisonM on Feb 26, 2009 - 4 answers