Fluent SMTP-SMTP Error: The following recipients failed

I no longer receive emails when new users registers on my site and they also dont recieve emails. I get the following error:

SMTP Error: The following recipients failed: [email protected]: “Your IP: aaaaaa : Your domain aaaaaa.co.za is not allowed in header From”

I used (aaaaa) to hide my info , i dont know if it’s personal or… please help me


This site will teach you how to build a WordPress website for beginners. We will cover everything from installing WordPress to adding pages, posts, and images to your site. You will learn how to customize your site with themes and plugins, as well as how to market your site online.

Buy WordPress Transfer