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I wish people would stop. It means in business emails there's a huge load of quoted confidentiality disclaimer stuff.

Please people, 3-line signatures.

I've often wondered what the total size per year is for corporate email legal disclaimers, both bandwidth and residing on disk, world-wide. Personal signatures would be an interesting stat as well.

Does Exchange (or any other mail servers) have some sort of de-duplication process for intra-message text like this? The wasted space has to be enormous in aggregate, but maybe compared to headers, attachments, etc. it doesn't end up being that big of a deal, especially for a single organization.

Mailinator has deduplicating. In fact, it has all sorts of nice optimizations, and the author writes about it quite eloquently. I wish mailinator backend could be used for mail servers instead of Exchange ;)

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