Comments for Does email coming from the same IP address imply that it was the same computer?

Comment from Col on 2009-01-11

2009-01-11T23:20:54Z

Yes...hotmail does include at least the IP address of the router that the user was connected too, I have confirmed that when i send an email through hotmail it includes my routers IP every time without fail.

It is possible your friend sent the mails but you cant be sure, what you could do is check all the IP's of your friend and also from the person sending the malicious emails and see if there is any pattern.

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A comment on: Does email coming from the same IP address imply that it was the same computer?

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Comment from Leo Notenboom on 2007-02-25

2007-02-25T23:37:27Z

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Actually, HotMail does occasionally include IP address of the computer
accessing the web service as the x-Originating-IP - I just confirmed it.
Not sure about other providers, but that bit of anonymity obviously
isn't guaranteed.

Leo
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A comment on: Does email coming from the same IP address imply that it was the same computer?

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Comment from Eli Coten on 2007-02-24

2007-02-24T20:50:54Z

The crucial point in this case is that it's being sent from Hotmail. Any emails sent through a web-based service will have the webmail provider's email address as the X-Originating-IP because the actual computer used to send the message is not writing the headers. The headers will be written by the server-side script on the Webmail hosting providers service.

So any email sent from a webmail service will have one of the IP addresses that resolves back to the webmail provider, and all you can deduce from it is that the spammer was connected to the same webmail server as your friend on hotmail.

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A comment on: Does email coming from the same IP address imply that it was the same computer?

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Comment from Leo Notenboom on 2007-02-24

2007-02-24T18:38:15Z

Yes, it could.

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A comment on: Does email coming from the same IP address imply that it was the same computer?

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Comment from kelly pettit on 2007-02-24

2007-02-24T08:37:37Z

I'm in a battle of the bands compitition where the winner is judged by the amount of votes they get on line. You can vote once a day from your computer. They count your IP address. I'm worried that if an office of 40 friends all vote for me, they only count as one vote if it's the same IP address. 40 different computers, 40 people voting, one vote counted. Can this happen?

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A comment on: Does email coming from the same IP address imply that it was the same computer?

Tech Questions? Get Answers! - Ask Leo! ... by Leo Notenboom
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