Who Sold You Out? – How to Figure out Who Leaked Your Email Address

When setting up accounts or handing out my email address, I use a catchall on a different domain I have, giving a different mailbox to each sender.  So, for instance if I give my address to Bob’s Cream Puffs to get a coupon, it might be bobscreampuffs@mydomain.com.  You can do this with a normal (non-catch-all) address too, by using the plus sign after the mailbox name.  In my case, that would be something like alex+bobscreampuffs@mydomain.com.  That trick even works with GMail and a number of other web services.

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