First step - aged domains?

Hi Uwewerner,

1 - that's correct... updated will update, the other two will stay the same...
2 - lol; no, Google doesn't care that much about you to personally email you

The simplest way is to go to Google and do a "site:domain.com" search - if the domain shows up, that means it's still indexed, which is a good sign (aka, it isn't 'completely blacklisted') - however, these days, it's also important to judge if the site's link profile is "healthy" or not... IE, if it has a bunch of spam links built to it, and it's been hit by an algo update, it's going to much more difficult to rank in Google...

Using a link tool like Majestic SEO or Moz Site Explorer, take a look at the site's current backlinks and make sure there aren't a bunch of obvious spam ones showing up (IE, porn, drugs, etc).

Once both of those factors are taken into account, there's a good chance it's clean and ready to give you a "shortcut" in the rankings.

(I'm actually working on an aged domain guide right now I'll be releasing soon - feel free to stay in touch and take a look to get even more in-depth... always gotta be stacking the odds in your favor as much as possible)

Good luck!

Keep in mind additional fun things can happen to domains .. banned by Adsense and Facebook always make life interesting

thanks Social App Zone
but can you also help about these question:

when an old domain that is dropped and re-registered what should I expect: I start from beginning with registration date or just the update will be updated?

Domains can also be on email blacklists and are almost impossible to get off of them, so you'd want to check that if you plan on building a list and emailing from an email address on the domain.