How can i set up to receive email externally to my internal domain

ucs-4-3

#1

How do I Receive email from domain admin@a.a.net to admin@a.net! i use no-ip dynamic dns
There is no external email server but just my internal!


#2

Are you looking for an answer how to configure this in UCS (basically you have to define all domains and addresses as documented in https://docs.software-univention.de/manual-4.3.html#mail::management::domains ff) or how to set up the external receival?