Plesk on Windows comes pre-installed with MailEnable, and using ASP you can use MailEnable to send out e-mails by creating a “MEMail.Message” object. In a normal Plesk install however, this won’t work, because of a missing measp.dll file. This file is included in the Professional & Enterprise edition of MailEnable, but not in the version that Plesk installs.
You can safely upgrade your MailEnable installation to the version you need, as described on the Knowledge Base of Plesk.
You could also copy the measp.dll file from another installation, and register it using the following command.
Regsvr32 “C:\Program Files\Mail Enable\Bin\MEASP.DLL”
The following registry key should also be added.
Root: HKEY_LOCAL_MACHINE\SOFTWARE\Mail Enable\Mail Enable\Connectors\SMTP
Name: Bad Mail Notification Sender Address
Type: String (REGSZ)
Typical Value: admin@mydomain.com
More information can be found on the MailEnable Knowledge Base: Error ‘ASP 0177 : 800401f3’ when accessing the MEMail COM component.