Looking through my caught spam folder I found at least one case
where a base64-encoded message body was scanned for keywords.
Here are some of the results:
SPAM: Content analysis details: (13.70 hits, 5 required)
...
SPAM: NASTY_GIRLS (2.2 points) BODY: Possible porn - Nasty Girls
...
SPAM:
03 1:06 PM
Subject: Re: [SAtalk] Base64 Encoded not scanned
man, 2003-02-10 kl. 20:38 skrev Dan Kubilos:
> Recently, Base64 encoding that is part of a multipart email are slipping
> past SA.
>
> Mime modules are installed. The logs show that the
> message was scanned and a spam
