New Code!
Postoffice has been rolled up to version 1.3.pre2 with the addition of support for sendmail filters attached to tcp sockets (via filter=host:port) and with a fairly large rework of the internals of runq so that outgoing connections will eventually time out if the remote server decides to teergrube the runq process.
It's still a pre release because I've not had a chance to test (or document) the milter support on Pell, but now that I support tcp sockets I should be able to set up a milter battery on some machine that's got a working pthreads library and point Pell at it.
The 1.3.pre? releases are another milestone for postoffice; the program (and supporting utilities) is now > 10,000 lines of code. I'm not sure if this is a good or a bad thing yet.