An error occurred while sending mail

I send mail with ThunderBird to Gmail and yahoo, It’s OK!

but when I send to some enterprise email server. this error display!

An error occurred while sending mail. The mail server responded: 5.7.1 <supportcalculate.ru>: Relay access denied. Please check the message recipient support@calculate.ru and try again.@

how to config it?

thanks!

For the mail server must be registered DNS record, for example mail.mydomain.org.
If no DNS entry for your mail server then other mail servers it is a spam server.
Read more about the MX DNS, and A DNS records.
Check with the command

nslookup mail.mydomain.org.