Yes, I believe you can. If you own your own servers then you can probably have more than one, indeed as you will be running and maintaining the servers on your own.
u mean smtp server? why do you need one? you already have email
There is no correlation between the two. A server can have an IP address without having any form of email system on it, and a server with an email system can have more than one account, and more than one domain name assigned to its IP address.If you want to get the IP address from an email, you can use the free email header tracer to obtain its IP address from the email.
Yes.
Yes, usually more than one.
gmail :D
How to find more than one address
no
One can find more information about Exchange Email from websites, such as GoDaddy, the Microsoft official website, and the Exchange Server Pro website.
no you cannot unless you make a different email but no you cannot do that.
In order to send emails one must have access to a SMTP server. Sometimes one's Internet Service Provider provides one. All web email accounts should have their own method of sending outbound email. But to send email from one's own computer using a program like outlook one must install his or her own server or receive an existing server's information from his or her ISP.
It isn't necessary and is often confusing to have more than one email account. It may be useful in separating work from personal communications.
If the servers were clustered, you'd lose the redundancy. Also more than one server will obviously drain the supply faster. No reason otherwise.