I have the idea of setting up "MS Exchange mail server" in windows and "Squirrel/sendmail/postfix mail server" or something in linux. I have some domain names publicly registered. I am using google hosted mail domain(paid) for sending and receving mails to one another.
One thing I don't understand is what I've to do to run own mail server to exchange mails GLOBALLY either in windows or linux.
I have registered domains and I want to know what are the requirements to run own mail server so that all the employees in my office access the mail server anywhere in the world and exchange mails one another. I think it's called an SMTP server, anybody could short-list the things/requirements to run my own SMTP mail server?
Thank you all!