Good email picked up as spam

I subscribe to a daily email called the Tablet.  The sender uses a slightly different email every day.  For example, Tablet Magazine <digest=tabletmag.com@mail133.suw14.mcdlv.net>; Tablet Magazine <digest=tabletmag.com@mail201.atl81.rsgsv.net>

Each day the email is picked up by Norton Antispam in Outlook and it goes to my junk file.  I want this automatically in the inbox but don't know how to do this because the address changes.  Can't say always accept from this sender.  Any ideas?