I had a blog site, i.e.
http://example2.com, then I bought a new domain, i.e.
http://example.com and 301 permanent redirected
example.com. But when I get into the Google Webmaster Tools, if I get some 404, and then click into the link and see the "Linked from" tab, it shows some links like:
According to Google, if you change your domain, just use a redirection for at least 4-6 months, but it almost passed. Then why Google has still traces of my old site?
The issue is important, because I don't want to pay for the old domain anymore.
I tried deleting my existing sitemap.xml and recreating it from the new site, but still such links are stored. What could I do?