> > > forward(5) of a_user (that's the one tried first) > > > |/usr/local/bin/procmail > > > > > > after that delivery to b_user is not attempted. > > > > THis is relevant to my previous post: why is procmail > > failing here in the first place? I find that procmail > > always fails for me without the -f option. > > > > No idea, maybe procmail is still running and waiting for something > to quit ? Can you check for the procmail process with top ?
What happens is that procmail actually does append the message to the appropriate mailbox, but without the leading 'From ' line. (And apparently, it exits with a nonzero status, thus disturbing smtpd, which was the OP's problem as I understood it.) Jan