Now a days, flash drive is getting cheaper and an average Joe can afford buying one. I put Popman to a test one notch higher and I copied the Popman directory and subdirectory to a flash drive per reference
http://www.ch-software.de/popman/forum/ ... .php?t=333
(note that Popman directory and subdirectory files were small)
and Christian Hübner's PopMan App works sans RULES.TXT and BLACKLIST.DAT. Now I can go anywhere using other's computers with Internet providers to retrieve, read, and delete the unwanted e-mail by just inserting the flash drive to a USB drive and start PopMan.
There's no mystery here, cause the computer's see the flash drive as one of removable data storage device.
And a word of cautions that some computers with fire wall will ask your permission first before using Popman App and some office computers with confidential informations, the USB drive is disable.