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Author Topic: Emails not addressed to me  (Read 1663 times)
IBecker
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« on: December 29, 2004, 11:12:55 PM »

I'm getting a huge number of emails that are not addressed to me and often not even to my domain. I have no problem filtering them to a Bulk or junk folder and deleting them. But I have wondered and asked many people and tech supports and administrators of web sites as well as help support from my domain(s). All avoid an answer to the question of how and why does this technically occur? Answers all deal with filtering them out which is easily done by almost anyone. Do any of you have a clue on this?

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Irwin Becker
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« Reply #1 on: December 29, 2004, 11:37:04 PM »

There are ALL kinds of ways to SPOOF an email.
These guys are good.. Wink
The BEST thing you can do is DELETE them.


Make sure you have a good ANTI-VIRUS Scanner
You'd be wasting your time adding them to your BLOCK LIST because the next will NOT be the same.You'd end up with quite the list... Grin

Cactus
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myownalias
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« Reply #2 on: January 01, 2005, 04:19:25 PM »

As said, it's easy to spoof addresses, infact all you have to do, is set up a false account in Outlook Express, and send using your ISPs SMTP servers. The reason why it appears to be sent to someone else is because its a bulk mail, they often have the primary recipient as their own hotmail address or other free email account, and have everyone else in the BCC field. As mentioned about just make sure you have a decent AV scanner, and delete the offending Emails, spam is a global problem, the only way not to get spam is create a unguessable address and never tell anyone about it.
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IBecker
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« Reply #3 on: January 01, 2005, 07:50:56 PM »

I appreciate your reponse(s) but you guys are missing my point. I do have adequate AV and anti spam devices in place and working. My question concerns the mechanics of email being sent TO, not BC or BCC me that is not addressed to me or even my domain. For example and email comes to me addressed actually "addres_mail@pdnet.com" and a wide variety of many others not even that close to an actual email address. Also if I were to try to send it back using "addres_mail@pdnet.com" in the TO box it would not work yet it came to me that way. Explain
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Irwin Becker
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« Reply #4 on: January 01, 2005, 09:17:11 PM »

Plain and simply, its Email address spoofing, very easily done, just tell you Email client to use "a@b.com" when your actual address is "c@d.com", most SMTP servers don't distinguish between a real address logged on their system and a fake address, especially AOL who have an open relay, or at least they used to. Because the address doesnt actually exist, you obviously can't reply to it. Your Email address doesnt show up, despite it being addressed to you is because of what I previously explained about the BCC field, the TO recipient doesnt even need to exist for the BCC's to be sent. Orginally this method was used as a privacy measure for company mailing lists, so the other recipients addresses were never disclosed, only a reply address for the originator.
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IBecker
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« Reply #5 on: January 01, 2005, 11:38:55 PM »

Thanks for the clear explanation. I've been looking for that for months but no one would explain it. One site like this one told me that if I wanted to know how to send these spam illegal emails that I should leave their site! I just wanted to know how it was done..not DO it!
Thanks again
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Irwin Becker
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« Reply #6 on: January 02, 2005, 05:56:40 PM »

You're quite welcome, I only know all this as I used to work for a company (who shall remain nameless) who adopted these tactics to advertise their products. I am happy to say that I no longer work for them.
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KaTaLy5t
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« Reply #7 on: January 02, 2005, 07:51:38 PM »

E-mail spoofing is one of the easiest types of hacking. Basically all it involves is a knowledge of Telnet commands, Unix commands and somone who is too lazy to secure their e-mail server. This is why there is such a problem with spam and junk mail. All someone has to do is find an un-secured mail server and they can send literaly thousands of e-mails off it. If the admin of the mail server has no security and doesn't bother checking their log files then it could go on indefinatly. Most admins find out because their servers are getting slow and they can't see why so they start looking and find that someone has been sending e-mails off the server.

It could take as little as 10 minutes to find a server that's not secured. There's no real way of stopping spam until the people who run e-mail servers wake up and secure them from hackers.

Not all hackers are bad though, there are "white-hat" hackers who just probe a server to  see if it's vunerable. If it is they use the server to send an e-amil to the admin informing them that their server isn't secure and telling them the best way to secure the server. Unfortunatly some admins don't like being told that their security isn't up to scratch and report the hacker if they find out who it was. This results in the "good" hacker being caught by the police and possibly being sent to prison.

Hope you learned something from this.

Ross
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