I fixed the 30 characters issue to allow up to 70 characters. And you may also use + signs in emails. The SMTP error doesn't occur anymore, and even when there

I fixed the 30 characters issue to allow up to 70 characters. And you may also use + signs in emails. The SMTP error doesn't occur anymore, and even when there was an error the email was still subscribed so no need to resubscribe again.