boxrdhn

I would suggest "The Phoenix Project" as an easy read

It might aound silly, but have you looked into a full header of an email which ended up in spam folder? Normally google provided some info about why and email eded up in soam folder.

I have started using pass (https://www.passwordstore.org) since last year and I'm quite happy with it. The main advantage of using pass is the feeling that I've control overy passwords and I also understand the process. If you decided to give it a try, make sure to have a look on available extensions.