Problems with list e-mail

I set up a list on my domain that I just switched over here. The address has as the domain. I have tried to send to the new list address from two different e-mail addresses and get the error message:

Delivery to the following recipient failed permanently:

Technical details of permanent failure:
PERM_FAILURE: SMTP Error (state 9): 553 sorry, that domain isn’t in my list of allowed rcpthosts (#5.7.1)

Is there something I can change on the list manager or in my control panel? It’s working for other lists members perfectly…just not me, and I’m the moderator!