Current the error-pages must be written in *.html-code in the fields. But many of my customers are not so fit in html. In Confixx, Plesk, vhcs... and so on (as example) you can set a link to your ready (by a wysiwyg-Editor) designed error-page. Does it give in ISPConfig 2.2.5 this possibility (to set a link) ?
No, we dont support links to pages yet. But your customers can just copy the HTML source from their wysiwyg editor to the ISPConfig textarea.