Fragmented message query

Martin Hepworth martinh at SOLID-STATE-LOGIC.COM
Tue Jun 14 12:03:55 IST 2005


Hi Michele

Basically the 'stupid' mailserver is splitting the email into chunks and 
transmitting each chunk seperately. The email client will then merge the 
chunks back into a single piece. I think Outlook can be easily setup to 
do this for large emails. (it's a bit like the old usenet was of 
transmitting large binaries by sendinf several smaller messages each 
containing a piece of the binary file).

I've not seen any reports of malware using this technique so I would 
suggest it's safe to whitelist.

--
Martin Hepworth
Snr Systems Administrator
Solid State Logic
Tel: +44 (0)1865 842300


Michele Neylon :: Blacknight Solutions wrote:
> One of our beloved clients corresponds with a company whose mail server is
> doing odd things to mail. MS reports the following:
> "MailScanner: Fragmented messages cannot be scanned and are removed"
> 
> What exactly is a "fragmented message"?
> 
> Can I whitelist it or will it be caught by the default checks?
> 
> Sorry if this is basic question, but my head hurts trying to think of a
> solution :)
> 
> Mr Michele Neylon
> Blacknight Internet Solutions Ltd
> Hosting, co-location & domains
> http://www.blacknight.ie/
> Tel. +353 59 9137101 | Fax. +353 59 9146970
> Tired of your current host? Save 15% when you move to us!
> 
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