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spam-curious
12-09-2006, 07:02 PM
Post: #1
spam-curious

One for Blink?

I started getting spam emails in my Outlook Express, always from a different person eg Jane Courtney, always with a random two word subject eg poseidon outback, always with a jpg type content (no searchable text) recommending buying stocks in such and such a company. Suddenly they stopped coming, but I made a recent rare visit to my inbox on the internet (from which my O-E mail is automatically downloaded) lo and behold, hundreds of these emails, all trapped by BT_Yahoo email's spam filter.

Question: how does it know it is spam?

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12-09-2006, 07:06 PM
Post: #2
spam-curious
Probably these e-mails are sent to thousands of addresses so if just one person puts it down as spam then BT will automatically class them all as spam. In our BT outlook express you can tick the box if it is spam then it won`t come through to your in box again.
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12-09-2006, 07:47 PM
Post: #3
spam-curious
but how does it know it's spam when the sender and title change every time?

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12-09-2006, 07:49 PM
Post: #4
spam-curious
I should imagine because the same e-mail goes out in such vast amounts at the same time. I will have to look into this further I am now intrigued myself
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13-09-2006, 08:17 AM
Post: #5
spam-curious
That is one way. Basically the spam filters are algorithms that work on a point scoring basis. The filter will check a number of different things. Here are some examples...
Is the return email address different from the sending email address - say give 5 points.
Does the email contain the word viagara? - assign 20 points
There are numerous words that spam filters will flag as "bad" words eg "free"
Is there a proper title - no? assign 5 points
Does the email come from an ip that has a history of spam - 25 points
Is the domain where the email from listed in SpamCop - assign 50 points
IS THE SUBJECT LINE ALL IN CAPITALS? - assign 10 points
Is there an exclamation mark at the end of the subject! - assign 10 points

These are just some of the things it checks. The filter adds up the points and if it's over say 50 points the email gets dumped into the spam box.

Haydon

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13-09-2006, 08:52 AM
Post: #6
spam-curious
Oh that's clever - and in my case it works a treat.

At first I wondered why the content of the emails was in the form of an image instead of text, then I thought it's probably a clever ruse to prevent my filter checking for key words in it, but despite that the filter works well.

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13-09-2006, 11:15 AM
Post: #7
spam-curious
My spam filter is dumping anything sent to me by the Head of English - she's a bit miffed, but we've worked out it could be because her surname has the letters VIA in :w00t:


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13-09-2006, 12:00 PM
Post: #8
spam-curious
SF, in this particular case, the email is probably being marked as spam because of the fact that instead of body text it just has an image. Very few (if any?) legitimate emails are composed in that manner. In addition to this, the anti-spam software may have identified that the spam is purportedly coming from a bogus domain.

All email comes with a set of headers, that are usually not shown to the end user, but they're still there. Those headers provide lots of clues about the origin of the email and whether or not the headers themselves have been tampered with.

Unfortunately, although this is all clever stuff, the spammers put a lot of effort into finding ways around all of the detection techniques. Eventually you'll start receiving spam again. At the moment there is no really satisfactory way around this problem.

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13-09-2006, 12:25 PM
Post: #9
spam-curious
I've just had a look at some of the recent stuff that has been filtered out, and there's been a development. Following on from the image containing text advertising cheap shares, there now comes some actual text, but it's random stuff as if penned by a schizophrenic or James Joyce. Just out of interest, any thoughts on what the point is?

[i][SIZE="2"]The well-bred, really cultured classes were on the whole passiveresisters. So, he was called up the first time and went.
The little sergeant kept saying:Dont you catch cold, you chaps. Somers took one of the heavy brooms, as ordered, and began. Somers went tothe door, in all simplicity.
Andthere was an Apache sort of sheepishness, stupidity, in everything hedid. Ive heardthat the coast-watchers have got orders to keep very strict watch onyou. And after all, it was war-time, when these thingsmust happen, we are told. Glamorous west ofEngland: if a man were free.
And the crashes of guns,and the awful hoarseness of shells bursting in the city. Now the tales began to go round full-tilt against Somers.
But the others didnt know this ragtime, and they werent yet in themood.
The bus was crammed, a solid jam of men, sitting oneach others knees, standing blocked and wedged. And bitter enough were the things they said: anddamnatory, the two Somers. So heposted his passports to the Foreign Office, for the military permit todepart.
And hetalked too with the men on the farm: openly.
Kangaroo had followed slowly,awfully, behind, like a madman.
They hated him because he wasfree, because of his different, unafraid face. But we had bettersettle the matter finally here. They had no use for him, and he had no use for them.[/SIZE]
[/i]

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14-09-2006, 11:36 AM
Post: #10
spam-curious
I got 127 emails today when I opened Outlook Express, none of them real.

I don't want viagra, ciallis or c ock rings, or shares in some non existant blue chip company. Is there really no way to stop these?

I asked before, and someone advised typing all the relevant 'buzz' words into the blocker but to no avail. It takes me a fekkin hour I don't have checking all of them before deleting them.

AAAAaarrrrrggghhh.

bam bam
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