Parsing Mail for better use of space

[InternalLoss]

Instead of simply storing the mail in its full MIME format in the database, we should potentially break the mail down and then make it reassemble at receive. This'd reduce space, and we'd also be able to lookup mail better if need be, as it wouldnt be one compound of the entire mail.

[InternalLoss]

@spotlightishere I also have a feeling this issue is also meaningless after the move to Go.

[spotlightishere]

Unfortunately it still exists. It more or less is the same as #6 however and is important.

[InternalLoss]

I think this and #6 should be closed; while it is potentially space saving, we've had no issue with space in the current iteration of the DB, and while it's not perfect it does work with very little issue.