Re: address@hidden: Locale Dependent Downcasing in smtpmail]

[Richard Stallman]

    + (defun downcase-ascii (string)
    +   "Convert ASCII argument to lower case and return that.

This seems to be a good solution.  The general macro would also be ok.

Using "ASCII" for the name and doc string are somewhat misleading,
since this is not limited to ASCII.  For instance, it works fine for
Latin 1 also.

What this function does is downcase in the most standard way.