How to raise your server for mailing lists?

Question

Mail server

You need to set up a small server for mailing lists in your company to send letters to your customers. The email database is small. It is planned to send about 1000 letters at a time, 2-3 times a week.
Interested in the following:

• How to avoid getting emails into spam? Do I need to somehow verify the mailing address from which the mailing will be sent? I would like to know more...
  
• The server itself. What iron is required for this? What internet channel?
  
• What are some other points to pay attention to?
  

ps We kindly ask you not to offer third-party services.
Thanks a lot!

Answer 1

The server itself will not help you much.
To send out mailings, you need to follow a bunch of conditions: DKIM, a link to unsubscribe in a special format, unsubscribe at the first complaint, etc., etc.
I would just contact a specialized mailing company. It is not expensive.

Answer 2

The easiest and cheapest way is to hire a specialist.

Answer 3

A mailer based on Postfix, with such loads and legal content, you will not get banned.
The main thing is that everything is configured correctly on the server. Everything written above is relevant. I will also add a reverse zone ... This is the first thing that will be checked. All my servers are configured to check the PTR record. SSL certificates are still needed, not self-signed!
Well, monitor your server in the lists ... But there are mainly servers that are engaged in virus mailings or are located in the networks that did it.