[Mimedefang] New way of obfuscating text

[Joseph Brennan]

--On Tuesday, February 10, 2004 12:31 PM -0800 Kelson Vibber 
<kelson at speed.net> wrote:

> At 12:10 PM 2/10/2004, Michael Sims wrote:
>> /font-size:\s*1\s*(?:px)?\s*;/i
>>
>> I'm not enough of a CSS expert to know what would happen if I threw "em"
>> and "ex" in there, but I'm afraid that might create some false
>> positives...
>
> 1em would be pointless for obfuscation purposes, as it would be
> equivalent to no font-size setting at all.  (In CSS, an em is the current
> line height.)
>
> 1pt might be useful to look for, though.



I've seen spam with this:     <font style="font-size: 0;">

That's not valid html with any number, is it?

Joseph Brennan
Academic Technologies Group, Academic Information Systems (AcIS)
Columbia University in the City of New York