After setting up my POP3 email settings within Zoho mail,  I am able to receive mail fine.  However, I cannot send.  I get a 553 error saying "that domain isn't on my list of allowed rcpt hosts".   I have verified my domain.   I  have not changed my MX on my domain (hosted elsewhere) as I'm not sure this is necessaryl.   Can you assist?

Also,  I added a second POP3 email address - I used the same incoming server and correct passwords - however I cannot receive or send!

Help?

Paul