Thank you for the tip, but unfortunately that does not work, i just tried. I also think the mail command is send to the server and the server would not understand vbmail as command, or maybe it should be $vbmail then?
Would be nice if Firefly would have a look into this. It's a great hack and I really would like to continue to use it in 2.3.0 beside my .htaccess security, double security is always more safe.
Maybe I could also use the updated version with more info but I need a version then which is tested and working on 2.3.0 too.