Here's a what the traditional logo and SSD modified version look like side-by-side:
From Paris With Love was the one place I could get the best look at the modified logo:
After attempting to glean every angle of the modified logo I could from throughout the series, I not only created the one you see above, but several more postal-themed POstable assets for all your social channels. Use them proudly declare your love for the POstables and SSD while petitioning the network for more in 2017!
I also want to note that the font I used is the USPS font, but they even created a custom font for the show, I think. I didn't know how to track that one down, haha!