You wouldn’t start off an e-mail with “My Dear X”, or “Dearest X”, since that would be too personal for a professional email, so “To X” being more impersonal seems like it would make the letter more professional-sounding, compared to “Dear X”.
You wouldn’t start off an e-mail with “My Dear X”, or “Dearest X”, since that would be too personal for a professional email, so “To X” being more impersonal seems like it would make the letter more professional-sounding, compared to “Dear X”.
I don’t think I’ve ever used Dear to start an email; always Hi for as long as I remember.
I don’t like To, it always seems like a command rather than a greeting. I write it on cards and stuff but it always leaves a niggling feeling of wrongness.