[Twisted-Python] Absent List-Id header?

[Phil Mayers]

>Reading the list via gmane, and looking at lvh's Message-IDs
>
><32FC267C-F4F6-4FBB-B553-15812751A7E2 at lvh.cc>
><3B814A92-5FED-45C5-A6AA-B77314E25899 at lvh.cc>
>
>both of which contain attachments, I see the expected List-IDs.
>

Weird. Maybe it is at my end; I wonder if our exim config or spam filter is selectively mangling...
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