Okay, first a slam, and then a commentary.
Slam
Hi Kit,
Hope you're well. I noticed your went to CalTech and wanted to see if you'd be interested in ...
Kitt with two Ts.
Are is a linking verb, so, "[I] hope you are good," or "[I] hope you are doing well."
The shortened name of the California Institute of Technology is spelled "Caltech," with a little t.
And I noticed you, not your, went, though you could make it your if you added a gerund after it and continued the sentence, "I noticed your graduating from Caltech and wanted ..."
The Gap of Fifty Years
Commentary Yeah, kitt finished writing this at 11:56 on 26 June 2017Let's contrast the difference nearly fifty years makes, shall we?
Check out the lyrics for "Cool Kids":