>> It _does_ mean that someone to whom email is important had better do >> due diligence in selecting DNSBLs - just as someone to whom a car is >> important had better do due diligence in selecting a mechanic [...] > I agree with that. But easier still is to setup your own spam traps > and run your own spamfilter. Which is what I think most actually do. Not easier for me; not easier for the ISP I work for (I'm part of its collective postmaster). I, at home, and we, at work, find DNSBLs by far the lower-cost answer, after all the costs are tallied (dollars spent, human time, false positives, false negatives, machines, disk space, network bandwidth, the list of forms costs can take is long). Perhaps we're atypical. I've always assumed we're more or less typical, but just on the general grounds that I assume typicality until I find evidence to the contrary. /~\ The ASCII Mouse \ / Ribbon Campaign X Against HTML mouse@xxxxxxxxxxxxxxxxxxxx / \ Email! 7D C8 61 52 5D E7 2D 39 4E F1 31 3E E8 B3 27 4B _______________________________________________ Ietf@xxxxxxxx https://www.ietf.org/mailman/listinfo/ietf