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I have a site which i registered Dec 03', it had about 5 backlinks at the time but then i took it off line for more than a year and have decided to revive it May 05'.
When i checked for the site in Google recently it wasnt shoeing up but now I have submitted it to a few directories, Google is now displaying it with the old cache
My question is if i start adding backlinks now would the site go into the Sandbox considering that the site was registered in 03?
would the site go into the Sandbox
IMO probably yes; I suggest that you are a little careful and try not to overdo with your backlinks. It's always better to be a little patient and work steadily to build backlinks with a more natural way in terms of time.
PS. I think that if you have also changed the Whois information may send your site to Sandbox for sure.