Hello,
We have installed VestaCP on our VPS.
And configured all necessarily steps.
However, unable to send email via round cube.
"An error occurred.Close
SMTP Error (451): Failed to add recipient "
[email protected]" (Temporary local problem - please try later)."
Please check the attached file.
Any advise please?
The error comes from the SMTP server. This is not Roundcube issue.