I tried my existing (old) AOL account and voila -- instant send of the same photo attachment (2MB) that I'd had stuck in SENDING mode on my Samsung Galaxy S4 for over 2 hours and counting!!! Apparently the problem is some sort of incompatibility between gmail and Samsung! Sad. I hate to have...
This problem is still around in May of 2015!! I'm finally so frustrated with my gmail account on the Samsung Galaxy S4 that I Googled to find a solution and found these dialogues. I've owned this phone since November of 2012 (I'm on the Verizon Wireless plan 4G and have Verizon wifi at home.)...