🚀 go-pugleaf

>Until recently I was the only one using procmail on our system. Last week
>my colleague also started using procmail and that's when the problems
>started.

>We have difficulties receiving mail from mailing lists we are both on.
>For example, we are both on a staff and develop mailing list, both locally.
>These used to work perfectly.

>It seems from the /var/log/syslog that only one of us is getting mail and
>that is indeed what is happening in reality.

You probably have a (very) old version of procmail, it still contains
the insufficient recommendation that you use:

"IIFS=' ';exec /usr/local/bin/procmail"

as the contents of your .forward file.

This tends to confuse sendmail (clearly a bug in sendmail) when multiple
users use this as their .forward file contents.  The new & improved
recommendation looks like:

"|IFS=' ';exec /usr/local/bin/procmail #YOUR_LOGIN_NAME"

Of course, substitute your, resp. your friend's username for YOUR_LOGIN_NAME.
*Don't* omit the '#'.

P.S. I can unofficially announce that there exists a procmail mailinglist.
     It will be officially announced when v2.80 of procmail is released.

     For people that want to get on it now, subscription requests to:

	procmail-request@informatik.rwth-aachen.de
-- 
Sincerely,                                  berg@pool.informatik.rwth-aachen.de
           Stephen R. van den Berg (AKA BuGless).    berg@physik.tu-muenchen.de

"I have a *cunning* plan!"