If anybody is interested in writing MAPI-based mail fetcher, here is a
program I made for personal usage from PMSEU utility
(http://www.genusa.com/utils/pmseu.htm). It is written in Visual Basic
(it was first time I've done something with this dialect - never used
Basic since my schooldays :-). All parameters are hardwired; some
command line/config file parsing should make this utility quite usable.

The original program seems to be in public domain (although I'm not a
lawyer); I don't claim any rights on my code too. Anyway IMHO it
should be rewritten in C++ (should not be too hard since COM
interfaces are almost the same) and given proper interface (like
GNUish command-line parsing), so it can be made decent part of Emacs;
I don't sure I'll do it myself (the "get a disclaimer from your
employer if relevant" part seems to be the hardest - there were no
precedents in the company I'm working for and it seems that procedure
will be quite complicated).