Ah got it, thanks.
Trying to redirect to Calendly auto-fill and they are after the "@" version, as opposed to "%40". If there's a workaround happy to donate / hire for consult. Cheers.
@creedon
The redirect url changes the "@" to "%40" ...any idea how to make it clean.
EXAMPLE:
sergey@google.com becomes sergey%40google.com
Redirect example: www.google.com/?email=sergey%40google.com
With thanks in advance.