Set Spell Check Binary to where your Spell check Binary is located. The path to Ispell is needed for the Spell Checker to function properly. (usually /usr/bin/ispell). Ispell or Aspell are recommended. Aspell (http://aspell.net/) comes packaged with most Linux distributions.
The Spell Check Spelling Dictionaries can be used when @Mail has more than one language. You must specify the appropriate dictionary file for each language in @Mail. This allows a user logged into the German interface to use the German Spell Checker, French interface to use the French Spell checker, etc. You must specify the full pathname of the dictionary file on your server, as an example for the English dictionary file ( /usr/lib/aspell/english or /usr/local/share/ispell/english ) .