Jostein wrote:

Hello Jostein,

Comments interspaced:

> When a virus infects a person's computer, it tries to 
> replicate itself by sending copies of itself to others. It's 
> source of email addresses is naturally the contacts lists in 
> the infected computer. That's the basic of all mail worms 
> (this type of virii).

OK.
 
> To hide it's tracks, some worms insert random names from the 
> same contact list in the "FROM:" field. This is called 
> spoofing. The result is that the infected email appears to be 
> sent from a totally innocent person. Sometimes, the worm 
> inserts the same name in the "FROM:" and "TO:" fields. This 
> results in your bizarre situation, that you appear to have 
> sent yourself an infected mail.
> 
> So the hi-jack has only taken place in some poor sod's 
> infected computer, and you're not to blame at all. In fact, 
> most ISP's have stopped bouncing notices like the one you 
> received because of spoofing.

Yes, I see. I am considering just deleting all such messages now. 
 
> You can, however, make a qualified guess as to who _really_ 
> sent the mail by looking at the message source code. In 
> there, you will find the IP address of the computer that sent 
> the mail. The IP-address can be looked up to see who owns it. 
> If the IP address is registered to a single person, you've 
> nailed the culprit. Typically, however, the owner will be an 
> ISP. They usually have a pool of IP addresses that are shared 
> out to it's subscribers as needed. So what you _can_ do then, 
> is to report the incident with source code and everything to 
> the ISP, and hope that they are kind enough to investigate 
> and notify the right subscriber about the infection. 
> 
> The easiest thing is probably to just delete the mail and 
> hope that the poor infected user finds out asap.

If I was sent the suspect e-mail directly, I could try and look that up. My
Waitrose a/c, simply tells me it has detected a virus, deleted it, but
informs me from which e-mail address it has been sent. Which of course, is a
spoof, so really of no damn use at all.

That's it, I will just delete them in future.

Thanks,

Malcolm


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