So, we just mailed out a bunch of wedding invites, and we had one stamp on each of the domestic ones. Turns out, the envelopes are 3 32nds of an inch taller than the limit for "letter size" and technically needed two stamps each. However, I just asked one of the recipients if he got his invite, and he did. If any of you are familiar with how the machines and processes in the postal system work, should I expect that they'll all make it to their destinations okay? Do the machines that let through the letter size mail have a bit of wiggle room? Or should I expect that the recipient I asked just got lucky and that the postal machines will weed out the others for being too tall and send them back? Thanks!