How many A DNS records can one domain have?

Question

Domain Name System

We have a mail server that is tied to a domain, all types of records are configured there, and now I want to tie a site to the same domain. Will it be enough to add another A-record with a different IP, or do I need to do something else? Or change the current A-record on the domain?

Answer 1

You need to create an MX record for the mailer and change the A record. Let's say you have a domain example.com
138.2.43.15 - mailer address
138.2.43.16 - site address
You need
MX records 10 mail.example.com
A mail.example.com 138.2.43.15
A example.com 138.2.43.16
SPF and DKIM are also needed reconfigure to mail.example.com

Answer 2

How many A DNS records can one domain have?

As much as you want.

Will it be enough to add one more A-record with another IP or do I need to do something else?

Yes.

Answer 3

Make site.ru A record with one IP and mail.site.ru A record with another IP (although you can keep the site and the mail server on the same IP) and don't suffer.

Answer 4

How many A DNS records can one domain have?

Technically, whatever. But in your registrar's domain control panel, this may be limited to, for example, 50 records.

The bottom line is, we have a mail server that is tied to a domain, all types of records are configured there, and now, I want to tie a site to the same domain, will it be enough to add another A-record with a different IP, or do I need to do something else?

The mail server is bound via MX records, not via A records.
Screw the site - yes, as you wish. You can put the web server on the current main IP or make another A record on the subdomain.

or change the current A-record on the domain?

It would be nice to understand an example of what and why you want to change.