Hello,
can you please open a command window and execute the following:
telnet server.local 25
You should get an answer similar to the following:
220 server.local Microsoft ESMTP MAIL Service, Version: X.X.X ready at Tue, 23 Dec 2008 15:40:00 -0500
PopGrabber is expecting the server to respond with a 220 code but it's getting something else.
Regards,
Eclarsys Support