On Sat, Dec 21, 2002 at 02:06:45PM +0100, Michael Schwendt wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > # Duplicate filter: Stores 256k of message-id headers. > :0Whc:msgid.lock > | formail -D 262144 msgid.cache > :0a: > /dev/null > Part of the idea of first copying to msgid.cache is that you can then also write the file to another mail folder. You can simplify the recipe slightly if you are just going to toss the duplicate to /dev/null. As the procmailex man page states: 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 Beware if you have delivery problems in recipes below this one and procmail tries to requeue the mail, then on the next queue run, this mail will be considered a duplicate and will be thrown away. For those not quite so confident in their own scripting capabilities, you can use the following recipe instead. It puts duplicates in a separate folder instead of throwing them away. It is up to you to periodically empty the folder of course. :0 Whc: msgid.lock | formail -D 8192 msgid.cache :0 a: duplicates -- Jim Kaufman mailto:jmk@linuxforbusiness.net Linux Evangelist cell: 612-481-9778 public key 0x6D802619 fax: 952-937-9832 http://www.linuxforbusiness.net -- Psyche-list mailing list Psyche-list@redhat.com https://listman.redhat.com/mailman/listinfo/psyche-list
