If procmail is 'installed' via a pipe in the aliases file it can be fed
the mail for only a single list. Then what you do with the mail via
procmail and how it eventually gets to LISTSERV is up to you. No LISTSERV
exit needed or used.

Greg Decker     NIH/DCRT/NSB

On Thu, 7 Aug 1997, Listserv Manager wrote:

> On Thu, 7 Aug 1997 13:14:46 -0400 Gregory Decker said:
> >I am not sure exactly what you are looking to accomplish, but if we are
> >talking UNIX I have used PROCMAIL, a general purpose mail filter, to
> >select based on what is in a header. This is a code it yourself solution
> >but if you can do regular expressions it is very flexible.
>
>
> I'm a little familiar with procmail, but I thought it would only work
> for ALL lists on the server (I want this for just my list).  If it can
> work on a list by list basis, I could write a procmail script called
> mylist.prefilter
>
> Now for the 64,000 purchasing unit question: How do I tell Listserv to
> call that procmail script?  Looking at the section on the Exit= keyword
> in the Listowner's Manual, I somehow get the impression that it would
> need to be a regular script, and not procmail.  Is this correct?
> Also, looking at the Site Manager's Manual, I didn't see an exit
> point that seemed appropriate for each message (they were for things
> like Subscribing, Unsubscribing, etc).
>