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

Is there a way to get Endicia (for Mac) to validate APO/FPO addresses? [more inside]
posted by cosmic osmo on Jun 26, 2008 - 2 answers

Where can I buy vintage, valid US postage stamps for face value or near face value? [more inside]
posted by bonheur on Sep 25, 2007 - 7 answers

Can I augment pre-paid postcards? [more inside]
posted by SBMike on Aug 29, 2007 - 15 answers

Where can I buy first class postage online? I need to be able to choose a custom rate (say, $1.57). [more inside]
posted by indyz on Jun 21, 2007 - 14 answers

Will the USPS reject an envelope weighing 1.1 ounces with 1 first class stamp? [more inside]
posted by duncantuna on Feb 20, 2007 - 12 answers

I have an envelope that's about 10"x13". Inside, I have maybe 15 pages of college application materials. And I have $3.90 in stamps. How the hell do I know how much postage I need for this thing? Should I try to figure it out myself, or should I just take it to the post office and have them figure it out?
posted by punishinglemur on Oct 1, 2006 - 12 answers

How flexible are the Postal Service's postcard size guidelines? [more inside]
posted by sandor on Jun 30, 2006 - 11 answers

How much would it cost to send a postcard to every household in the United States? [more inside]
posted by yeoz on Mar 2, 2006 - 13 answers