Take the tour ×  I want to set up an email server in a large
company, and actually they already have their mail server, and I
wonder if I want to set up another internal email server
(specific for our solution, no need to connect to internet, just
enable their server can forward email to my server at
XXX@demo.local). Is this possible ? Do I need another domain ?
or just use domain demo.local will work ? If the hmailServer
doesn't connect with their active directory, then can their
server recognize my server and can send email to XXX@demo.local?
share|improve this question This question is probably better
asked on Serverfault. I've voted for it to be moved there and
once enough others vote, it'll be moved automatically. – 
music2myear Nov 9 '11 at 23:25 I recommend editing the question
and giving the server unique names (like primary.example.com and
myone.example.com, you company domain will be probably
example.com). It will be much easier to understand what you want
to do. –  Jens Erat Nov 9 '11 at 23:49 Upd