Question : Someone is using my e-mail address

I received an e-mail from myself that I did not send myself. Could it be that someone has my log in information? or Is it possible to send and e-mail from any you want. I tried to reply to the e-mail I had but it was addresed to me, so I just deleted the message. I am fairly sure no one has my log in information. How is it that they are using my address to send e-mails, how did they do that?

Answer : Someone is using my e-mail address

ok, first I am assuming that you dont manage your own mail server, if you do, what change your ISP to yourself.

First things first.  If you got a mail from the SPOOFER, open its headers and look for the "Received" lines.  Make sure that it does not come from your ISP.

If it is from your ISP, someone may have you password.

if not, your mail is being spoofed.

Basically the only thing you can do about it is to start using PGP and SPF.

PGP is a tool that lets you sign every message you send.  This way it can be proven that you sent the message and not someone else.  To use PGP is just a matter of configuration of your mail program.

Now, SPF is a technology that lets every one knows which servers can send mail for your domain.  This way if anyone sends a mail from your address, a SPF enable MTA (which is growing fast) will verify that the mail came from an unauthorized mail and will reject it.

The person spoofing your mail will so have to move to another mail without SPF protection.

To enable SPF you will need to to contact your ISP.

SPF Home: http://www.openspf.org
PGP Description in details:  http://en.wikipedia.org/wiki/Pretty_Good_Privacy