How to configure MailEnable mail relaying on Plesk for Windows server
Step 1: Perform Remote Desktop Connection
to the Server where Plesk is installed
Step 2: After successfully access to your server via Remote Desktop Connection, open the MailEnable Administrator
program by selecting  Start
>> On the Windows search tool and searching for the keyword MailEnable
and then click on  MailEnable as the picture attached below.
Step 3: Go to Servers
> Services and Connectors
> right-click on  SMTP
>  Properties
Step 4: In the SMTP Properties window, select the  Smart Host
tab. Tick to  Smart Host Enabled
to Enable configuration. IP / Domain and Port
: Enter Relay Hostname and Port information provided by vHost to you.
Please tick to  Remote server option that requires authentication
, enter the username / password provided after registering Email Relay service at item  Account Name / Password
Finally, click  Apply
>>  OK
to save the configuration.
Restart SMTP Connector: right-click on SMTP > Stop
and then click on Start
In case you need more support, please contact vHost via the following channels:
Call Center: 19006806 (press 2)