If you change the IP address in the A-record, will the mail drop?

Question

Domain Name System

Gentlemen, tell a young designer (me) how to change DNS records correctly so as not to break anything.

There is a client whose website and mail hang on appletec hosting. Zone settings in the image -


I now need this domain to open a site on Tilda. Here is a screenshot from the tilde guide -



But it is extremely important for me that the mail does not fall. The client uses the appletec mail server and sends and receives mail from it (using mail.ru as a client). The question is what needs to be done to start opening the site on the tilde, but the mail has not broken. If I change the IP in the A record, as suggested by Tilda, will the mail stop coming?

Sorry if this is a dumb question, but unfortunately I can't figure out how this system works on the fly.

Answer 1

Forgive me, you didn’t cover up the domain in one line, but I’ll cover it with dots:
the name mail.t----s.ru is a CNAME on t....s.ru probably.
But worse than that,
MX points to t.....s.ru, and thus if you change the A record to another IP right now, the mail will drop.
In order not to fall, you need to correctly configure MX, untie it from the old type 144.76.94.173.

Answer 2

the MX record is responsible for the mail,
that is, if someone sends a letter to [email protected], the letter goes to the IP address specified in the MX record (there may be several of them with different priorities), and it is expected that an smtp server hangs on the specified IP address, which listens for receiving emails

Answer 3

If the same domain is registered here, then the mail will break.

Answer 4

If the mail is hosted, and the site will be on tilde, does the client need hosting and mail on it at all?
As far as I can see, the domain was bought on the masterhost.
Why should he pay for hosting?
Make him mail, for example, to mail ru, free of charge, with dimensionless boxes, with your own applications and a normal web interface.
Transfer all the mailboxes from the hosting with all the contents to mail ru, and set up the site and mail normally.
ns-records are probably also registered for hosting, you can change them to ns registrar or the same mail ru, there is normal free dns-hosting
The client will receive a website, convenient mail and will not pay extra money for hosting