Setting up a CentOS server for distribution. Am I doing it right?

Question

Email

Hello! I set up a server to send messages on behalf of the company.
Essence and procedure:
1. Bought a server on CentOS and ISP Manager
2. The domain name, respectively, is tied to the server and the NS zone from the same registrar.
3. In the ISP Manager tab "settings" - "opportunities" I configure the mail server
4. Next, the tab "web server settings" PHP extensions - enable imap
5. Then I create a user
6. In the "domain names" tab I create a domain
7. Go to the tab "mail domains" and turn on dkim dmarc
8. In the admin panel I create a database
9. I go to the "mailboxes" tab and create mail to send and receive complaints.
10. Then I confirm the sending server in mailwizz (via sending a letter) I go to roundcube and confirm.
11. Then add the send domain to mailwizz - generate dkim spf records.
12. I add them to the DNS Manager - while dkim is already registered there (because I checked the enable box in the "mail domains" tab) + (similar to SPF) I change these two entries to those generated by the mailwizz script.
13. I add an imap record
14. I confirm the domain, I verify - everything is ok.
Then the letters go away and everything seems to be ok!
The question is next.
I can not bind a new server from another provider!
The NS zones of the domain are registered on firstvds, where I set up the first server and everything seems to be successful.
That is, I buy a server from another provider - NS zones on firstvds. I can't bind.
Can you tell me the same setup algorithm? And if I understand correctly, you can't do without ISP Manager on a new server? Is it necessary to create mail, databases, make changes and configure the mail server on the territory of the server registrar? Only NS records will be on firstvds.
Is it possible to implement this without buying extra for each ISP Manager server?
Thanks in advance for any feedback, advice or hint!

Answer 1

Is it possible to implement this without buying extra for each ISP Manager server?

This is not only possible, but even necessary. True, judging by the level of presentation in the style of screws "poked here, bryankul there" for the first time, you will do it for a very long time :)

Answer 2

And so in it and zatyk. There is a sh script, but there is no working link that the script refers to during configuration. Essence in setup of file system of the server. As I understand it, he loads these files or there is some kind of script. I don’t know where to get these files or maybe there are some standards.

Answer 3

I bought an hp dl380p gen8 server last month, but I was afraid to configure it myself. I already had a sad experience, so I decided to ask for help, so to speak, without leaving the cash register, in the same store https://www.westcomp.ru/catalog/servery_hp_prolian... where I got it. An engineer came and did everything without any problems.