Hi, * Edmund GRIMLEY EVANS [04/17/02 22:31:00 CEST] wrote: > The start of my .procmailrc is below. The in-line Perl script removes > all header fields except Date, From, Subject, To and Cc. MD5 sums are > appended to $MAILDIR/MD5, so you should remove the beginning of that > file from time to time. Duplicates are sent to =dupes. It's not > efficient or elegant, but it seems to work.
[...] ,----[ procmailex(5) ]- | 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 sim- | ple recipe eliminates duplicate mails. It tells formail | to keep an 8KB cache file in which it will store the Mes- | sage-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 fol- | lowing 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 `- Cheers, Rocco.
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