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Hosting my own mail... when I show students the logs you can see the spam flowing to the wife and daughter's accounts, and being totally rejected.
Using postfix+spamassassin with a reverse lookup black list, checking spif and/or dkim records. What little spam makes it through to my account Thunderbird then takes care of.
One technique that I use for my own stuff is to use extended addressing. Anytime I have to give my email I add the business to the address. At least this way if I start getting spam I know who's CEO address I should look up and forward that unique address to him/her.
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