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Re: Duplicate message handling filter

1997-10-28 06:28:24

I was wondering if any of you have a small .procmailrc filter that
ignores duplicate mail with the same subject header.  Mind you,
not based on msg-id.

Adding the following before any other recipes implements what you want:


      :0 hW :$SUBJCACHE.lock
      |formail -R subject: message-id: -D 65536 $SUBJCACHE

Hey, this is cool.  Now more questions: 

1. Does this drop the old message-id or does it make two message-id fields?

(assuming two fields)

2. Wouldn't this still ignore duplicate IDs as well as duplicate subjects?

3. Are there mail handling programs that will crash and burn when a message
has two IDs?

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