How to build a company's mail server

2, want to pursue stability, you can buy a server computer, if the conditions do not allow the use of ordinary computers is also possible. Download another set of email system software (MDamon is recommended, there are trial versions as well. . Installed on this computer.

I don't know whether your home is home broadband or company broadband. If the company's broadband will have a fixed IP, it can apply to the broadband service provider to open port 80 (the specific method is to call for consultation, and it is difficult for individuals to apply now). It is better to have a fixed IP. I haven't tried a mail server without a fixed IP.

4. Resolve the domain name into a fixed IP.

5. Install the mail system software. If it's MDamon, there are many methods online.

This kind of problem can't be explained clearly in a few words. You'd better have someone to guide you