If you someone sends you an email, it doesn't directly get to you as there some servers in between which receive the mail.
Without the servers, you may have to face some delay in receiving or sending important emails from your mail ID to someone else.
Mail servers speed up the whole process and ensure that you receive the mails as soon as it is sent by the sender.
You must have seen that now you can send a mail-in a few seconds with a single click. It is possible because of the email servers.
See all information best Windows mail server
