I've been using an old version of x5 and the mail forms work perfectly.  Now I've installed X5 evo and the mail forms just won't function.  I have an option to change the version of php on my server - it was set at 5.3 when the problem became apparent so I reset it to 8.0 but this hasn't helped - the old forms still work but the new ones just hang on the pc or give me HTTP ERROR 500.   I seemed to have a brick wall on this so any advive would be appreciated.....