where 'DIR' is the list directory, as the first line in DIR/editor (for mail to list), DIR/manager (for mail to 'list-subscribe', list-help, etc), DIR/moderator (for mail to 'list-accept', 'list-reject'). ezmlm-check(1) will send its output to SENDER. The rest of the .qmail file will be ignored. If you use a non-standard ezmlm binary directory, change the ezmlm-check(1) path accordingly.
ezmlm-check(1) in combination with mail logs and ezmlm error messages should make it easy to diagnose setup problems. When done, don't forget to remove the ezmlm-check(1) line. It is not security-proofed against SENDER manipulation and with it in place, the list won't work.
ezmlm-check(1) does not check all aspects of list generation, but catches all common errors when lists are created with ezmlm-make(1), an many other errors as well. The ezmlm-check(1) reply is also very valuable for support via email.