[Mailman-Users] New Lists not getting emails from internal domain

[Neilrey Espino]

Hi,

I have successfully migrated our Mailman to a new server. All seem to
work perfectly on the existing Lists. 

However when, I created a new list, somehow emails coming from the
internet are being accepted/relayed and bounced properly but email
coming from my own  domain indicates "unknown user".

Example :

Domain name 	  :  network.com
Mailing list Server : lists.network.com



I updated the /etc/aliases as well.

Thanks in advance.

Neilrey