- Plesk for Windows
The option What to do with mail for non-existent users is set as Forward to address at Plesk > Domain > example.com > Mail Settings, but emails are not delivered to the catcall address with the error:
PLESK_INFO: 550 Requested action not taken: mailbox unavailable or not local.
The option Disable all catchalls is enabled in MailEnable SMTP Security settings.
Log in to the Plesk server via RDP.
Start MailEnable Management at Start > MailEnable.
Go to Servers > localhost > Services and Connectors > right click on SMTP to open its Properties.
Select the Security tab and uncheck the option Disable all catchalls:
Click OK to apply the changes.
Open a command prompt and restart the MailEnable SMTP Connector service:
C:\> net stop "MailEnable SMTP Connector"
net start "MailEnable SMTP Connector"