Error: SMTP Error 533

What's Causing This Error

SMTP error 533 occurs when the recipient's email server does not have sufficient disk space to hold/accept the email.

Solution - Here's How To Resolve It

The recipient's email server must have sufficient disk space to accept this email, which the user may request from the recipient's email server or system administrators. Once sufficient disk space is available on the email server, the server will start accepting emails.