I read through the threads and didn't find anything.

Maybe I didn't state my question clearly enough. Zen Cart's set-up screen is giving me this error message -- that "admin@localhost" is not a valid email.

I need a valid email because I've already made a login error once and had to reinstall from scratch.

However, if Zen Cart does not support localhost email, then I can't use a local development environment. Which means I need to look for another cart I can work with...

Any help would be appreciated.