My erase junk mail is grayed out The option to erase junk mail does not show up when I right click and in the menus it is grayed out. Any idea how to get it back.

I am running Yosemite, 10.10 on an iMac.

I couldn't find anything using google except someone else with the same problem and no answer.

Thanks.
Try to set your settings to the what you see below, this may fix your issue.