Buddy-List Mail-O-Mat is an open-source mail filter program with web-based tuning tool to deliver only wanted mail by using block / buddy lists and naive Bayesian statistical analysis.
Mail is delivered to your mail address d-deOCL very normal. Periodically, your mail is filtered (setup by your webmaster, usually on the hour). Your mail is also filtered whenever you visit Buddy-List Mail-O-Mat.
This filtering classifies mail either as blocked, from a buddy, contains executables, looks like spam, or it's good mail. Mail that contains executables has attachments with an extension of bat, cmd, com, cpl, exe, pif, scr, vb, vbe, vbs, or wsf.
All but buddy and good mail is deleted. But, not to worry, all mail is preserved and accessible by Buddy-List Mail-O-Mat.