[Evolution] Converting from Kmail

[Dan Stromberg]

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On Mon, 2004-11-01 at 15:14, Jon Biddell wrote:

> >
> > If I recall correctly, this was considered and not implemented-- it's
> > not clear that nearly-identical messages can be identified properly
> > without a lot of processing.
>=20
> Interesting - I wonder how the kmail guys do it - it seems to work pretty=
=20
> well, with only the rarest of false deletions - I had a mailbox with 16k=20
> messages (deliberately created to test it) which was a double-import of=20
> another mailbox - I *knew* there would be exactly 8192 duplicates, and km=
ail=20
> shot through the file in less than 30 seconds.

If you want to be quick, you can just delete all but one copy of
anything with the same Message-id: header.

If you want to be more thorough, you could additionally generate sha-1
or md5 hashes of all messages as they come in, perhaps inserting them
into a heap.

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