[Esd-l] Weird Message-ID

[Tommy Lindqvist]

Greetings list,

We have recently been made to change into Outlook coveralls.
( Outlook 2003 )

Every once in a while, Outlook manages to produce Message-ID headers
looking like the following:

> Message-ID:
<!~!UENERkVCMDkAAQACAPQAAAAAAAAAOKG7EAXlEBqhuwgAKypWwgAAbXNwc3QuZGxsAAAAAABOSVRB+b+4AQCqADfZbgAAAABDADoAXABEAG8AYwB1AG0AZQBuAHQAcwAg
AGEAbgBkACAAUwBlAHQAdABpAG4AZwBzAFwAZQBkAHYAYQByAGgAXABMAG8AYwBhAGwAIABTAGUAdAB0AGkAbgBnAHMAXABBAHAAcABsAGkAYwBhAHQAaQBvAG4AIABEAGEA
dABhAFwATQBpAGMAcgBvAHMAbwBmAHQAXABPAHUAdABsAG8AbwBrAFwATwB1AHQAbABvAG8AawAuAHAAcwB0AAAAGAAAAAAAAABOYxA83noARJ5otPA3OtvSwoAAABgAAAAA
AAAATmMQPN56AESeaLTwNzrb0uQtIAAAAAAAEAAAAA+0264ZmrpBuFiXFCL6xd8TAAAAUC1IUEwtQ1JJLTAwMDY3LVNFAA==@space.se>

An email having a header like this is stopped by the Sanitizer. 
( And it should be stopped according to my rules for long headers. )
Trapped excessively long header:

Anyway, I was seeking advice on how to deal with this type of Message-ID. 
Should I just increase my tolerance for long headers, or should I try to 
track down whatever Outlook is trying to do when it
produces such a header ?
( The message has not been tainted by any exchange servers. )

I am not using the latest version of the Sanitizer, but 1.144 if it matters.

Regards,
Tommy Lindqvist