Hi, I wrote my first Haskell 'project', a test suite for my personal SIEVE mail filter script using dovecots 'sieve-test' tool: https://github.com/thkoch2001/sieve-test-hs The file Network/Sieve/Test.hs might actually be interesting as a standalone library. The most important function is assertMailActions :: Mail -> Actions -> IO () 'Actions' is a type that describes the result of running a SIEVE filter over the passed mail, e.g. store in a certain folder, discard, reject, ... Somewhere the external process 'sieve-test' is called. At this point I'd like to make certain things configurable: - the path and name of the executable - the parameters for the test-sieve executable - the name of the sieve script - the place where to store the temporary mail files - whether or not to remove the temporary mail files Does anybody has an idea where I could start to look for a solution? Thank you, Thomas Koch