Issue Problem sending/receiving emails

[virgils]

Hello All,
By 2 days i am working to fix the mail function for my server. On the postfix i think is configured ok at the same time all settings.

I don't understand what is wrong. Any suggestion what can be wrong?
Domain name b a b zer.com

Is any way to check logs, errors?

Thank you,

 

[Brujo]

unfortunately there aren't enough information available, take also into consider to tell the community which OS & Plesk Version you have. Perhaps you can explain what your issue is a bit more detailed

Plesk for Linux services logs and configuration files

there are a lot of Online tools available to test Mailserver like:
Email Server Test - Online SMTP diagnostics tool - MxToolbox & Domain Health Check - Online Domain Tools - Blacklist, Email, Website, DNS - MxToolBox
Secure Email
intoDNS: checks DNS and mail servers health

 

[MarkM]

Looks like it's running Ubuntu, Dovecot, Postfix, Onyx 17.8.11.

We still need more to go off of though. What's in the logs?