PHPMailer .Exception:SendAsDeniedException.MapiExceptionSendAsDenied

Question

I have installed PHPMailer on my website. But, I can\'t get it to work the way it should. When I send an email through the website, I get the following error:

Answer 1

Office 365 requires the "<" and ">" characters since September 1st, 2018.

This can often be fixed by updating the settings on the device or printer by adding angle brackets ("<" and ">") around the Reply or Mail From address.

See Microsoft's support for details.