Totally agree.... after so many losses (I didn't have much to lose at these times so it's not a big problem for me) I've become good at knowing legit and scam emails by looking... most of these scam Emails are sent to as many people at once so they don't always has the real 'you' as the receiver but a "distant you' you can feel....
I tend to ask any person that sends me Email I didn't know before "where did you knew me?" as I frequent many websites and don't keep track who is who unless I talk to them a lot.