I get a Dilbert comic in my e mail every day, but lately, OS X mail marks it as junk every day. Each day I hit the "not junk" button, but the program doesn't learn. This is really odd, since the program used to recognize the e mail as not junk, and since I also get another comic that there are no problems with. Can anyone help me? Why can't mail learn to recognize this daily e mail as "not junk"?