[sirclueless]

If I were starting a company to provide service for this protocol, or if I were an email provider considering supporting this protocol, I would be much more happy if it were called something other than Dark Mail.

If this really is just a protocol, and not a marketing name, then the main thing it needs to do is be inoffensive and distinguishable. Honestly, I would be much more comfortable starting a company around a protocol named something super-dumb like MURP or another non-descript acronym.

There are probably names that are just as bad for other reasons, but one of the top goals of naming something like this should be avoiding getting targeted as something intended for illegal use.