Some files are taken from other projects :
- googiespell from amix@amix.dk, MIT license
- lib/html2text.inc from jon@chuggnutt.com, GPL license
- - lib/des.inc from Paul Tero, unknown license
- lib/utf8.class.php from Alexander Minkovsky, public domain
- lib/{enriched,icl_commons,imap,mime,utf7}.inc from IlohaMail project, GPL license
- lib/encoding/*.map from Unicode, Inc., with "BSD-lite" license