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I post comments in many blogs, and for a while, I had a serious problem that whenever I posted my comment with my emailadress, I’d soon see a marked increase in spammail. This all really cleared up when I actually got my own top level domain, razumny.no, and here’s how:
Once the domain was up and running, I started setting up my email accounts. What I did was create one adress, and then set that up as a catch-all adress, so that anything ending it (at) razumny . no would go to my main adress. Once that was done, I started setting up adresses wherever I’d leave a comment, so that when I commented at RennyBA’s Terella, the adress would reflect that.
The point to all of this is elegant in its simplicity; whenever I get an email sent to one of the catch-all adresses, I see which one it is. The practical upshot of this is that if I see an increase in spam to a specific adress, I’ll just block that one adress. This way, I don’t have to set up loads and loads of adresses, and I still keep spam at an absolute minimum.
Another advantage to this setup is, of course, that whenever I spell my email address out to someone, it doesn’t really matter what they put in front of the @-sign, it’ll get to me.