AntiSpam is blocking all mail

Suddenly today, AntiSpam started reported that it was checking my mail and was allowing 19 messages and blocking none, but did not pass them through to my email program, Eudora, nor did it list them in the quarantine database. I eventually had to disable the program and have my email program download the messages directly from the server. Also, I am not getting messages from specific email address listed on my allow status.