Getting an error Address not found Your message wasn't delivered

Getting an error Address not found Your message wasn't delivered

Hey,

I'm trying to configure zoho mail for my website https://businessentity.org/


I'm able to successfully send the mails but when someone sends an email to above mail, this error shoots up:

Address not found

Your message wasn't delivered to meredith.karter@businessentity.org because the address couldn't be found, or is unable to receive mail.


Please help me to fix the issue.