Why would an ordinary innocent email user be base 64 encoding their ordinary text. And why does it get such a big score. Here is the points awarded
HTML_50_60 (2.1 points) BODY: Message is 50% to 60% HTML HTML_MESSAGE (1.1 points) BODY: HTML included in message BASE64_ENC_TEXT (3.6 points) RAW: Message text disguised using base-64 encoding MIME_HTML_ONLY (1.2 points) Message only has text/html MIME parts
This really was an innocent user from a local council. What on earth could they have set on their mail client to get a score like this?
Ron
On some bad advice, I set up a rule on my MTA to copy all base-64 encoded emails into a spam folder and delete them from the delivery queue. Slightly more than half of the message caught were spam. Almost half were email from/to corporate employees who were using MS-Excel and Outlook to email spreadsheets to each other. As well, I believe you can force Outlook to use different encoding (although, IIRC, it's not base-64 by default). I tested on one machine on our LAN, and from inside Excel 2000, select File and Send as email. Voici, base-64 encoded when it goes out. I'm glad I didn't follow the advice to _delete_ all base-64 encoded emails. I'm glad I was testing the rule first by quarantine.
HTH, Alan
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