Every mail becomes ****SPAM****

Hi there,

My first post in this forum: starting today every mail come into my junk mail with description SPAM (this is an adjustment in avast)
Even when I sent an email to myself or my wife on the same desktop.
No adjustments are done to windows, outlook 2003, Avast or whatever!

What can be the problem and can anyone give a solution?

With regards,

Jaap