We are using Mail Enable Enterprise Edition version 3.x, I have a group email account "mygroup@mydomain.com" ; I want this group to be able to receive emails only from Post-offices hosted on the server - and not from any external domains.
Do I need to setup a SPAM Filter in "MailEnable Management > Messaging Manager > Filters"
If YES, then please can you guide me as to how I would restrict all external domains and allow ONLY Postoffices hosted on my server ?