Cannot receive mail from outlook, gmail, yahoo

SYSTEM INFORMATION Rocky Linux 8
OS type and version REQUIRED
Webmin version REQUIRED
Virtualmin version REQUIRED
Related packages SUGGESTED

I am able to send mail to outlook, gmail, yahoo but unable to receive mail from them

Update 1:

Reason/reply from outlook:

No connection could be made because the target computer actively 
refused it. This usually results from trying to connect to a service that is
 inactive on the remote host - that is, one with no server application 
running. For more information and tips to fix this issue see this article: 
https://go.microsoft.com/fwlink/?LinkId=389361

Update 2:

The email in question is webmaster2@rightplacemanpower.in

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