I hear you. but hold your horses - it doens't validate in 4.5.5 either (not that you shoudn't update, though) Let me see if I can fix it...

Hi,

Just checking in to see if you had any luck.

Thanks

Jerry

Found the solution for this in my version 4.5.1. 

To fix:

1) Find all rows in the ModuleSettings table where SettingName = 'Security_EmailValidation'

2) Change validation string to:   \b[a-zA-Z0-9._%\-+']+@[a-zA-Z0-9.\-]+\.[a-zA-Z]{2,4}\b

3) Log in as Host and restart your application

Email validation with "-" should work.

Theo Karagiris
TK Consulting Pty Ltd
http://www.tkconsulting.com.au