The demos on the web for use with indy (10.5.7 in Delphi XE) are very old, there are not working not with Delphi 2007 or newer. Is there a short demo for to setup an Pop3-Mail server with Delphi 2007 or newer with Indy 10.5.7?
The demos on the indy-website are from 2004, it is sad that there are not newer demos.
There is an article and source code for a pop3 (Indy 10) server in this site
Hope that helps