It seems that the mail package almost always puts double-quotes around the 'name' part of addresses e.g. in From, To, etc. headers - even for pure ASCII names without commas, etc. - and I believe it also always wraps the address part in < and >:

• Example Name <name@example.org> ---> "Example Name" <name@example.org>
• name@example.org ---> <name@example.org>

It would be nice if the package would make these transformations only if necessary, and otherwise keep the simpler forms.