Thanks for the reply, Christian!!!
I searched my computer for the occurrence of popman.ini in \windows directory and in Popman directory and I don't have a popman.ini. How do I create the popman.ini and what directory should I put it.
I asked this cause I copied all the files in Popman directory and subdirectory to two computers and put the necessary files (blacklist.dat, error.log, mailcache.dat, popmanlogfile.log, rules.txt) in c:\documents and settings\administrator\application data\popman.
All two computers were working after copying the files without the Popman installation but have to create e-mails account for both computers. Both copied blacklist.dat and rules.txt also works for both computers.