[j7k6]

I'm hosting my mail on my own server with postfix and dovecot for 6 years now. It's running smoothly, but I invested alot of work into it. it was fun to figure out how everything is working, anything I needed to know I had to google and stitch the pieces together for my needs, but it was totally worth it because I learned so much when doing it. Since I know how easy the whole system could fail, I would never run a professional/commercial mail server by myself, not even for a small company. Office365, always!

So google for postfix, dovecot, mysql, dkim, roundcube and figure out how to glue it all together. Advise: start with an unused domain, not with your everyday mail address, migration can be done when everything is tested and running.

[umen]

Thanks , what failure points should I be carful ?

[j7k6]

Don't get yourself onto spam block lists, which can relatively easy happen if your mail server is misconfigured. You can test the spam-level of your outgoing mail on this site: https://www.mail-tester.com

[umen]

I saw this site to day ... How does it give you level of spam ? How can it give score based on what ?

[j7k6]

you send a mail to the displayed address and it will parse the incoming mail and analyzes the message headers. the headers contain valuable information about the authenticity of the mail. If a mail looks authentic to the spam filter, it will be marked with a lower spam score.