This guide offers a solution for the SMTP 530 error: “denied access” that occurs on the parallel Plesk panel for Windows while trying to access MailEnable. Please note that this guide is relevant only for specific versions of the Plesk panel for Windows dedicated servers.
When attempting to access MailEnable, you may encounter an SMTP 530 error indicating “access denied.” This simply means that the connection has been refused access in the SMTP. This could be due to settings in the Access Control properties of the MailEnable Administration Program on the server or due to an IP being blocked because of numerous subsequent invalid commands.
To address the SMTP 530 error and resolve the “access denied” issue, follow these steps:
- Using the administration console, navigate to the following location:
Servers > localhost > connectors > SMTP. - Right-click on “SMTP” and select “Properties” from the menu.
- Go to the “Inbound” tab and click on “Access control.”
- Ensure that the Access control option is set to “Granted access,” and check that the incoming connection IP is not listed under the “Except those listed below” window.
Essentially, if the SMTP security setting for “connection dropping” is enabled, the incoming IP address will automatically be added to the inbound “Access control” list. If this setting is not enabled, the SMTP service will drop the connection and add the connecting IP address to the inbound “Access control” list when it detects many subsequent invalid commands.
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