Great info and thanks Len.. now I've got it.. regex possibly means 
regular expression?  I agree on your analysis and it falls within 'good 
common sense' ;-).

Thanks,

~Rick

Len Conrad wrote:

> 
>> Ok Len,
>>
>> For us laymen out here.. what duh.. is unanchored regex?
> 
> 
> You can anchor regex to the BOL or EOL, meaning the search for match 
> will only be applied to the the BOL or EOL data.  As opposed to 
> non-anchored regex will will scan every single byte, say, in your 30 meg 
> mpeg porno clip.
> 
> what's nice about blocking by .ext of the attachment, you don't have to 
> scan entire attachement.
> 
>> is that for scanning non text based email or specific to imgate stuff?
> 
> 
> It's Regular Expression stuff.
> 
> Unix is very strong in text processing tools, and the foundation is the 
> regex lib's built into the OS, or into language like PERL.
> 
> I don't know if Scott has put full regex support into his products, and 
> I'm pretty sure Imail's pattern searching is not full regex.
> 
> anyway, one should try to match on headers or attachement type or file 
> type of the attachment, since the scanning target is small and fast.   
> Only as last resort, scan the entire body.  In fact, if you conclude 
> that you can only block by scanning the entire body, then you're 
> probably sscrewed, unless you have tons of surplus computer power to 
> waste on full body scanning.
> 
> Len
> 
> 




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