On Thu, 01 Nov 2001, Ken Guest wrote:
> I've tried google and freshmeat, searching for a tool to remove
> duplicate mails from mbox files to no avail.
> Does anybody know of such a utility, or do I need to cobble one
Formail (part of procmail) should do it. With the -D option, formail
keeps a cache of Message-IDs it has seen, which is used to check for
duplicate messages. When used with the -s option (splitting), formail
won't output duplicate messages. You need to specify the size and
filename for the Message-ID cache.
For example (with an ID cache called msgid.cache of size 8192):
formail -D 8192 msgid.cache -s < oldmboxfile > newmboxfile
John Gaughan, Systems Administrator
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