Moving ham/spam from Exchange folders to sa-learn?

[Henry Kwan]

Hi,

Currently running SA 3.25 via MailScanner frontend (CentOS5 box in the DMZ) to
Exchange2K7.  Have setup two public folders for users to dump spam/ham in. 
What's the usual way of moving these messages back to SA for learning?  The
volume isn't that high so if there was a way to convert .MSG to a format that
sa-learn understands, I could then just sftp it back onto the CentOS box.

Any links or tips would be appreciated.

Thanks.