Archive for October, 2008

Tracing an IP address from an email

Wednesday, October 8th, 2008

This is the second step after you have uncovered the IP address from the email header. If you do not already know how to do this, see our page on “tracing an email“.

Your IP address is:

Try entering your IP address into these tools to see just the kind of information you can glean from a simple thing like an IP address:

Find Geographical Location of an IP Address:
RIPE Search (enter IP Address):
Find the owner of an IP Address:

Remember, an IP address does not necessarily tell you where the person is, but where their ISP is if they use a POP mail service (like Outlook or Outlook Express). If they use webmail, then you will see where the mail server is, and it may even be in a different country. For example, they can live in China and send you an email from Yahoo – in that case, you can trace the email back to Yahoo!, but not to China. Yahoo! would be able to do that, but not you.

You can also find out what country someone has mailed from by checking the IP address with a geographic locator database like this one.

Email Password Cracker

Tuesday, October 7th, 2008
Password stealer

You need to crack a password? Lost your Password? No problem!
You need to have the target's exact email address for this to work properly. Just the name is not enough.

To crack an email password at one of the popular mail providers, select the provider below (these are the easiest networks to crack):

Enter the email address here:

Most other servers can also be cracked. (Unfortunately, not all.)

Finding an email by company

Monday, October 6th, 2008

We have developed a special search algorithm to easily find someone’s email address by the company they work for. In fact, this tool works a lot like an email address ‘extractor’. If you enter a company’s name or email extension, it will return dozens of emails at a given company.

This tool works even if people try the common trick of hiding their email address like this:

  • joe.smith(at)
  • sue.jones[at]

This tool is of interest to headhunters (recruiters) who might need to find someone from an old email and wish to take a guess at a new one, or it is possible to mine a whole database of email addresses for a whole company.

A clever person might actually even take this one step further.

How can you get someone’s phone number from their email address?
There is an old method that still works. First, you need to sign up for “Plaxo”. Then, you need to send an email to yourself, but FROM THAT PERSON! (See our section on email spoofing). Once your Outlook sees it coming in, if you have the Plaxo plugin, it will automatically update that person’s Vcard if they are in Plaxo! We have built a very basic PHP mailer to do this if you have your own server.
If that does not work, you can always do a normal Google search with their full email address in quotations like this: “email hidden; JavaScript is required” and hope that something will pop up.

Email Search Tool

This search tool will uncover email addresses from all over the web according to the domain you enter

Enter an URL (without the WWW).


This tool will help you identify a company's email protocol, which will enable you to 'spoof' email addresses and hopefully find the person you are seeking.

Tip: If there are a lot of pages, search towards the end of the results!

How to video: email forensics

Finding someone from an old email address

Saturday, October 4th, 2008

People are always moving around, and it it sometimes very difficult to find someone if all you have is an old email address.

There are a few tricks you can always try, for example just trying to use their old email address and seeing if they have one at the popular webmail services such as Yahoo!, Gmail, Hotmail and AOL. If their old email was formatted like this: email hidden; JavaScript is required, then you can try this formatting at the above mail services. This is not likely to work if they have a common name – you will get a false positive at each of the services.

There are still some mail lookup services that you can use such as, and If you have changed email addresses, and would like for old friends to be able to look you up, it would be a good idea to register with each of them. and old email address lookup (Free):

Old Email Address

Free 'Change of Email Address' Registration
Old Email Address
New Email Address
Also add my old/new email registration to Return Path’s Directory.


Bigfoot old email lookup:

First Name Last Name (Required)
City State





FindMeMail old email lookup:
Old email lookup from
Enter the old e-mail or URL Address:

Wildcard characters will NOT work. Database searches for full e-mail addresses only.
(They have done this to prevent prevent people from compiling a mailing list from their database.)




It would be a good idea to register with these databases so that old friends and potential employers can find you if they need to.