ME020417 - TRB: SMTP 530 error - denied access


Accessing the MailEnable SMTP service produces an error that the connecting IP address has been "denied access".


The IP address of the inbound connection has been denied access in the SMTP Access Control properties of the MailEnable Administration Program. IP addresses can be added here if the IP has been automatically banned because of too many subsequent invalid commands.

Example error:

530 ESMTP MailEnable Service, Version: 8.00--8.00 denied access at 01/01/15 17:00:00



  1. Navigate within the Administration console to the following location: Servers->localhost->Services and Connectors, right click on "SMTP" and select "Properties" in the popup menu.
  2. Navigate to the "Inbound" tab and click on "Access Control".
  3. If the Access Control option is set to "Granted access", then ensure the IP is not in the list being denied access. If the Access Control option is set to "Denied Access" then the connecting IP address needs to be listed in order to be allowed access.


The incoming IP address can automatically be added to the inbound "Access Control" list if the SMTP security "connection dropping" option is enabled. The SMTP service will drop the connection when the failed number of commands or recipients is exceeded and add the IP address to the inbound "Access control" list.

Keywords:denied access smtp error service connecting 530 Connection to host lost
Class:TRB: Troubleshooting (Configuration or Environment)
Revised:Wednesday, May 4, 2016