On Sunday 05 November 2006 10:25, Carlos E. R. wrote: ...
By the way, I'm not sure it cost them more money to handle spam than filter it. Passing on the spam received is just some resources. Filtering them is, I think, extra resources and man power. Using filters like spamassassin are very cpu intensive; and any way, that spam mail has entered their servers, so they store it in our folders that have limited space, anyway.
Use greylisting - the spam email does not enter the system, with _no_ false positives. No need to use dubious blacklists such as SORBS which justifies their actions with IEEE _drafts_ they submitted themselves... I did run and still do a test where I let the same email be seen by greylisting and by some blacklists, and so far greylisting does catch more, and the blacklist does not add additional value. I'm fully aware though that this will change once the spammers adapt and built more mail server functionality in their spam bomb software.