mail does not receive any destination mail account

what was the issue our CWP server after the sent mail from our CWP server, That mail doesn't receive any destination mail. Post-fix services also running successfully.

But why this issue we have faced?

hello, I am a new user in Centos WP, I just created a new account, everything works perfectly I can send emails, but I cannot receive them, you managed to repair that problem, any suggestions, I would greatly appreciate it

you should check mx records in dns and mail server logs, or check with cwp support

here is a good site for dns testing
http://leafdns.com/

I have the same problem, my clients can only receive emails from each other, but they cannot receive any from other domains

Well I have already solved my problem, I just had to rebuild the mail server and everything is back to normal.

Hello,

Again we face below error. How can we fix it.

SMTP Error (454): Authentication failed.