Unable to receive emails to particular email account in Plesk: User unknown in virtual mailbox table

Dmitry Bystrov

1 year ago

Symptoms

Unable to receive emails to a particular email account with the following error message in /var/log/maillog file:

550 5.1.1 john.doe@example.com: Recipient address rejected: User unknown in virtual mailbox table

Postfix virtual_alias_maps misconfiguration. Namely the recipient address is missed in the Postfix virtual_alias_maps configuration:

# postmap -s /var/spool/postfix/plesk/virtual | grep john.doe@example.com
#

Connect to the server via SSH.
Add missing alias for the affected mailbox:

# echo "john.doe@example.com john.doe@example.com" | postmap -i hash:/var/spool/postfix/plesk/virtual

Note: replace john.doe@example.com with the appropriate email account from the error message.

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