[Dshield] Any legitimate reaason to strip SMTP X- headers?

Harry Hoffman hhoffman at ip-solutions.net
Tue May 24 14:54:23 GMT 2005


feeble attempt to hide client software types/versions?

Brenden Walker wrote:
> Hopefully this is an acceptable topic. I think it is.  
> 
> I'm primarily a programmer, dealing a lot with TCP/IP and related
> protocols.  One of our systems uses email to replicate database data.
> The email's contain several X- headers so that we can positively
> identify them as 'ours'..as it were.  The other day QA was just
> restesting things, and found that none of the headers were getting
> through.
> 
> After several hours of poking around, I found out that something
> in-house (possibly websense html proxy) is also proxying port 25 and
> stripping off ALL X- headers (including semi normal X-Mailer and the
> like).  
> 
> I'm not even sure I see any legitimate reason to strip these header off.
> I'm just curious if there are real reasons to strip these?
> 
> Thanks.
> 
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