So I get this package today of a block of stamps, and the sender used a heavy card for a stiffener, or this envelope would have been shredded.

I think they used this to clear a jam.

You can see this tear is clean through. It extends about an inch or so up the package..

As you can see here the stamps only suffered a crease. the tear did go through the glassine envelope, but missed the block. And the USPS wonders why people dont want to send stuff using them. Hopefully I will have my own MPP and can have my stuff included with the metered mail. May still suffer sorting damage, but at least it wont be from the ink sprayer.