Hi,

I've spent a day or two in setting up my own e-mail server. Why? Well,

1. our site can easily send more than 4000 emails or more per day.... a few posts on the site will produce that number of emails sent and I didn't want to pay for something that is not so hard to do if you have a bit of knowledge and patience to read tutorials about how to correctly set up mail server....
2. respecting our users privacy. When they create account on our site they trust us with their personal data including e-mail address. If we would use third party SMTP server we are giving their e-mail addresses to that third party without their consent....
3. If I learned how to run my own web server for multiple domains and manage them I was sure I can also learn how to setup postfix, dovecot and all other sub systems so that my e-mail server is not on any black list and that emails sent from it doesn't end up in receiver's Spam.

And I succeeded. All major email services like gmail, yahoo ex hotmail etc. are not bouncing emails from my server, it is secure and it is private and it is free and I have full control over it.

Here is one good tutorial

Part 1: https://www.linuxbabe.com/mail-server/setup-basic-postfix-mail-sever-ubuntu

Part 2: https://www.linuxbabe.com/mail-server/secure-email-server-ubuntu-postfix-dovecot

(I didn't follow the tutorials above but it is basically the same as the one I followed) just discard the part where they do some commercial offers about hosting provider etc., if you already have one...

If you manage to make it work it is then very easy to use it for multiple domains as well. Luckily latest postfix supports SNI (Server Name Identification) - here is video tutorial about that on Youtube: https://www.youtube.com/watch?v=tpyBLTqTYcc

So, guys and ladies let's go to work 😎

If you need any advice I am willing to help....

Cheers

Mayki