Xmail ou outro módulo, suporte grande qtde de envios?

Fatal error: Cannot instantiate non-existent class: xoopseditorhandler in /home/meusite/public_html/site/modules/xmail/admin/param.php on line 75
Notice [PHP]: Only variable references should be returned by reference in file include/functions.php line 493
Notice [PHP]: Only variable references should be returned by reference in file include/functions.php line 493
Notice [PHP]: Only variables should be assigned by reference in file class/database/mysqldatabase.php line 236
Notice [PHP]: Only variables should be assigned by reference in file class/database/mysqldatabase.php line 236
Notice [PHP]: Only variable references should be returned by reference in file include/functions.php line 493
Notice [PHP]: Only variable references should be returned by reference in file include/functions.php line 493
Notice [PHP]: Only variable references should be returned by reference in file include/functions.php line 493
Notice [PHP]: Only variables should be assigned by reference in file class/database/mysqldatabase.php line 236
Notice [PHP]: Only variable references should be returned by reference in file include/functions.php line 493
Notice [PHP]: Only variable references should be returned by reference in file include/functions.php line 493
Notice [PHP]: Only variables should be assigned by reference in file class/database/mysqldatabase.php line 236
Notice [PHP]: Only variables should be assigned by reference in file include/cp_functions.php line 57
Warning [PHP]: main(/home/meusite/public_html/site/class/xoopseditor/xoopseditor.php) [function.main]: failed estou open stream: No such file or directory in file modules/xmail/admin/param.php line 74
Warning [PHP]: main() [function.include]: Failed opening '/home/meusite/public_html/site/class/xoopseditor/xoopseditor.php' for inclusion (include_path='.:/usr/lib/php:/usr/local/lib/php') in file modules/xmail/admin/param.php line 74