Hi , I did R 301 to my recent site and keeps my old site post on it , some post back to another R301 that dropped two years ago . on that time many of my post were ranking well and bring me big traffic , but my old site take hard slap from latest G update . so I R301 to another domain . I notice looks like G penalize all those old posts ever on the new domain , like it consider it as spam or non original contents , since the old site (posts source) expired long time ago . and for sure many spam blog ere copying from it . few days ago I delete almost all post from that domain (about 80 post ) , and I'm thinking to create new post every two days to keep it refresh and raise it contents size . anyways all my major keywords are on safe but I still wonder if this size of 404 could give me bad impact on G eyes .