Subject: Re: multiple messages...
To: None <current-users@NetBSD.ORG>
From: Simon Burge <email@example.com>
Date: 07/13/1997 16:14:04
I sent the following to this list a few days ago, and have had a few
> If it helps, I've got a procmail filter that weeds out duplicate message
> ID's, and I've only seen one of everything. This is different to the
> last mailling loop we had when I saw many of everything...
>From `` man 5 procmailex '':
If you are subscribed to several mailinglists and people cross-post
to some of them, you usually receive several duplicate mails (one
from every list). The following simple recipe eliminates duplicate
mails. It tells formail to keep an 8KB cache file in which it will
store the Message-IDs of the most recent mails you received. Since
Message-IDs are guaranteed to be unique for every new mail, they
are ideally suited to weed out duplicate mails. Simply put the
following recipe at the top of your rcfile, and no duplicate mail
will get past it.
:0 Wh: msgid.lock
| formail -D 8192 msgid.cache
I actually use a 1MB cache, since some mail around here had a habit
of reappearing after a week or two, and the 8KB cache just wasn't big