I have used this person's blog for a few operating systems.
https://blog.andreev.it/?p=1975
Poke around for the correct OS. I only set up dovecot and postfix. Keep it simple. You then need opendkim. I think opendkim checks the incoming mail. There is another procedure to sign your mail.
When you think it works, use https://dkimvalidator.com/
Also go to mxtools to verify you haven't created an open relay.
Regarding LetsEncrypt, I use the bash script. https://github.com/acmesh-official/acme.sh This saves you Python headaches.
Original Message
From: michael.schumacher@pamas.de Sent: October 26, 2020 1:09 AM To: rdiezmail-2006@yahoo.de; pch@myzel.net Cc: dovecot@dovecot.org Subject: Re: Looking for a guide to collect all e-mail from the ISP mail server
Hello R.,
Sunday, October 25, 2020, 11:12:48 PM, you wrote:
RD> I was hoping that there would be a complete mail server setup RD> guide somewhere for this kind of setup. But I guess I'll have to piece all these RD> information snippets together.
There are plenty of guides available. I don't know your mother tongue, but seeing your last name, I assume you may be speaking German. Take a look at these German language guides:
https://www.it-management-kirchberger.at/manuals-tutorials/server-centos-7/p... https://www.dokuwiki.tachtler.net/doku.php https://dokuwiki.nausch.org/doku.php/centos:mail_c7:spam_6
I am sure others can provide other language guides as well.
best regards
Michael Schumacher