Just Thoughts

Of all the emails we receive within 24 hours, around 95 % is spam! Of course we deploy a mail filter to go through all these emails and pass the legitimate ones only.

Now we are introduced to some emails that are clearly spam but get through, you’ll see the email with an image attachment of Viagra products for example.

If your filter box is text based, it won’t detect this kind of spam, the image spam. A brief overall description, of how a message is considered valid or spam, is it goes through several tests, based on the overall score, the verdict is issued.

The email can be blocked based on a number of things other than the email content, you can block all emails with images except coming from your whitelist for example, but this is not acceptable, especially if you have what I like to call the “Friends Spam”, employees using their work account as personal mailing account.

Your filter needs to include a special image filtering feature, that goes, even if not quite efficiently, through the image and detects text. I don’t think it understands the image itself, because we are still advancing in that arena.

What you can do, is add the sender’s address or domain to your blocked list.

On a lighter note, if there is a small little tiny chance that a spam message passes through, your main mail filter appliance and the end user’s email scanner, which employee’s inbox will it end up in ?????

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