Occurs while sending a mail message. This error may appear when there is a misconfiguration in mail server/webmail settings. It means that the relay is closed for your IP address.

To fix general issues with mail server configuration, run the following repair utility:

For Plesk 12.5/Onyx:

# plesk repair mail

For other versions:

# /usr/local/psa/admin/sbin/mchk

Make sure that pc-remote service is started:

# service pc-remote start

Try sending mail and if the issue persists, check /var/log/maillog for additional errors and search for the solution in Plesk Knowledge Base

Known issues

• Cannot send email from Roundcube: 4.7.1 Relay access denied
• Mail users cannot not receive messages: Relay access denied
• Unable to connect to the mail server using Atmail: Relay access denied
• Mailman mail list is not working with external mail service: Relay access denied
• Unable to send an email: 554 5.7.1 Relay Access Denied
• Cannot send mail using Outlook: 554 5.7.1: Client host rejected: Access denied