How to Remove X-headers

Scott Silva ssilva at
Fri Mar 13 22:11:33 GMT 2009

on 3-13-2009 2:51 PM Alex Broens spake the following:
> On 3/13/2009 10:29 PM, Hugo van der Kooij wrote:
>> Hash: SHA1
>> Randal, Phil wrote:
>>> We've hit the same issue this week.
>>> The relevant Microsoft documentation is here:
>>> Understanding the Impact of Named Property and Replica Identifier Limits
>>> on Exchange Databases
>>> Events 9666, 9667, 9668, and 9669 Received When Named Properties or
>>> Replica Identifiers Are Depleted for An Exchange Database
>>> Note how Microsoft has completely lost the plot on this one, and fails
>>> to understand that there could be any number of unique X- header lines,
>>> not just their arbitrary limit of at most 327766 "Named properties".
>> So if I start adding randomness to my headers and send out enough email
>> to an exchange server I will get the Exchange admin into a tight spot?
>> I must say I almost feel tempted to install just such a scheme to hit on
>> Microsoft admins worldwide ;-)
> hey, no need to go thru such trouble....
> consider how many of these are silently doing it for you, nice and
> slowly. till at one point, 10 mails will DOS a box.
> Botnets attacks are peanuts compared to this.
> lets start counting:
> ESP's tracking & X-Mail headers.
> Antispam devices adding huge header sets
> MUA headers
> MailScanner Organisation/etc unique headers
> Devices using Spamassassin with modified header sets
> BATV type implementations
> there sooooooo many out there at some point there'll be global panic
> hitting Microsoft related forums/lists.
> Honestly, dunno if one should start sending out advisories to clients to
>  prepare for the big bang, or does M$ ack and promise to provide a fix?
> Alex
Microsoft will probably SELL a fix as an upgraded Exchange version. Or they
will sue everybody when they suddenly find that they own the patent for mail

MailScanner is like deodorant...
You hope everybody uses it, and
you notice quickly if they don't!!!!

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