Sieve theory has a rich and romantic history. The ancient question of whether there exist infinitely many twin primes (primes p such that p+2 is also prime), and Goldbach's conjecture that every even ...

Test sieves are woven wire or perforated metal pans that are used for sifting and filtration. Test sieves are accurately constructed by placing wire cloth between two suppressed die formed frames.

Note that Postfix looks for a user's ".forward" file first, so one could bypass SIEVE (dovecot-lmtp) altogether by putting this in ".forward": However, it's not necessary to do this, as we have ...