I’ve set registration to Require application again, don’t like this bots creating accounts.
Also I’m running into email limitations. Using the Sendgrid Free plan of 100 emails per day, but if a couple of member have email notification on, I’m reaching that 100 very quickly. How do others handle the high email traffic ?
Catchall was removed. Mod verification is the only way to slow them down. Won’t keep them from littering your inbox.
As for the mail issue, try using a Gmail with a per app password.