I run my own email on a PC in my basement. Each company that /requires/ an account for purchasing gets an email unique to that company. This has a few advanta

I run my own email on a PC in my basement. Each company that /requires/ an account for purchasing gets an email unique to that company. This has a few advantages, one, if you so choose, it becomes trivial to sort email into different folders. But beyond that, if company X decides to overrun their specific address with advertising (I would call it SPAM, but the CAN-SPAM law calls it an "existing relationship") and their "unsubscribe" link does not work, then I simply disable that one email address and the SPAM problem is gone. Also, it becomes abundantly clear which companies sell their email address lists to spammers, and halting the spam again involves simply disabling that one address.