HN user
I'm with you on this. I will hit 3 YoE in June and have been doing excellent in my current role yet having no luck finding a new job. Interviews are hard to come by and I'm a month out on even getting a rejection reply from some companies.
Assuming I follow what you want to know, the wikipedia page on email spoofing should provide the info you desire. https://en.m.wikipedia.org/wiki/Email_spoofing
I'm pretty surprised gmail didn't flag this at least. When I did it for a class in Uni, it always let me know that the FROM header didn't match the sender since that's a clear attack vector
E-Readers are phenomenal and I highly recommend them if that interests you.
American Kingpin by Nick Bilton is an excellent book covering Silk Road and what makes this unique
Worm is outstanding. It's responsible for getting me into reading which has shaped my life since