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Email and meetings are tools for information exchange. Like most tools, they can be applied well or misapplied. A SubZero refrigerator is one of the best in the world, but if the door is left open, it won't do a very good job of keeping its contents cold.
Email applied well carries valuable information, increases the perceived value of the originator, and in the case of multiple recipients, the shared information adds to the feeling of a team.
Email misapplied carries little valuable information, wastes time of the recipients, and degrades the perceived value of the originator.
Meetings, as a venue for real-time information exchange, can also be well-managed or misapplied.