My onward ticket has always 5 months from my arrival. I was told by a Thai Consulate they don't care what your outbound ticket is because anyone can change this at anytime....
Get a letter from Immigration it only costs 500 baht. I did it on a tourist visa at the Bangkok Bank. I've read that the banks are now reluctant to open accounts for US citizens, due to the US governments requirements.
Strange I just received the exact same message? It's not a scam and it came from the actual Visa address, I'm sure it's a glitch in their system. I received my visa months ago.