Welcome to our self-help documentation

Our fast, easy and intuitive self-service documentation helps you effortlessly get to your answers. If you still don’t find what you need, our 24X7 online Developer Support is always ready to help.

What do you mean by “The mail server responded: 5.7.1 &(email removed);: Sender address rejected: not logged in.” ?

This error occurs when you have entered wrong SMTP authentication credentials. You need to enter the correct Pepipost username and SMTP password in order to get away with this error.