I want to integrate SpamBayes into a Win32 application and I would like to ask your help for it. I read about something similar on the internet and there the sb_bnfilter has been suggested as a solution. I downloaded the sources from CVS and I tried to compile the C version of the sb_bnfilter but it isn't possible because it has several Unix specific C commands, which doesn't exists under Win32.

I'm not familiar with sb_bnfilter, but I'm fairly sure it is a 'helper wrapper' for spambayes - it is not necessary for the core spambayes functions, but used to make life simpler for certain users. You should read the source to see exactly what it does.

But before I continue to work with sb_bnfilter I would like to get some more inormation about SpamBayes. Here are my questions, please answer them: 1, first at all what are the main modules of the SpamBayes? In the sources I see several files, but I am sure only a few is related to the main functionality and the rest is UI or for other things.

The UI and message database are fairly key features - but the core of spambayes itself is really the spambayes\tokenizer.py

2, what is the architecture of the app? it is a client-server application, meaning a server daemon is running in the background and one or more clients are connecting to it to request mail scanning services? Or it is a stand-alone application, which is loaded in memory every time when a mail is scanned then is unloaded when it finish?

Please check out the docs. There are a few ways it operates - one is by using a "proxy", which is a long-running process that your mail client connects to instead of the real mail server. Another is integrated into outlook, so that also is a long-running process. There are also scripts to perform various operations from the command-line, and they tend to perform what was requested and then terminate.

3, what storage is used to save the training informations and where is it located?

There are a few formats supported - spambayes\storage.py has the implementation.

4, what is the minimum required source files to have Spambayes working? Here I mean working without UI and use it in command line, by sb_filter.

I don't believe anyone knows the answer to that. Everyone here is concerned with making spambayes work as a whole. There has been no attempt to reduce it down to the minimum possible. To look at it another way, what you see today *is* the minimum possible to support all current and supported uses of spambayes. Other apps with different requirements and different feature sets may well have a smaller set possible. I hope this helps, Mark