record (A type) for the hostname

Hello everyone. I have a problem in the email. The mailtester is saying I need to enter an A RECORD with the name of my domain:

You may want to publish a DNS record (A type) for the hostname server1.edicoescobra.com.br or use a different hostname in your mail software.

My server is named server1.edicoescobra.com.br. If I understand well, the mail requires the RECORD server1.edicoescobra.com.br point to edicoescobra.com.br? But an A RECORD should not always point to an IP?

But where do this? In LIST DNS ZONE / EDIT RECORDS edicoescobra.com.br my domain?

But it remains another problem because tenhos other domains on the server, as will solve the problem when creating the email support@meudominio2.com.br? Can I create several A RECORDS pointing to all server1.edicoescobra.com.br?

Thanks a lot for the help!

"A" record must point to IP Address  ex. edicoescobra.com.br A 192.168.0.100
"CNAME" point to other host ex.  server1.edicoescobra.com.br CNAME edicoescobra.com.br
you can create many A record pointed to same IP address
you also can create many CNAME pointed to same host

Thank you, Jae! I will still try, but you've solved some of my doubts.

thank you