On Oct 7, 2009, at 6:33 AM, Stephen J. Turnbull wrote:
Haven't looked in your spam bucket recently, I guess. Spammers regularly put 8 bit characters into headers (and into bodies in messages without a Content-Type header), for one thing.
Interesting story: Launchpad (which is open source now so there are no secrets) uses XMLRPC when Mailman holds a message for moderation, storing it in Launchpad's database for display to the list (team) owner. Well, I was lazy, stupid, or both and didn't wrap the objects in a Binary over the wire, so we were getting tons of failures here. But none of them seemed to have any practical effect on user experience (read: we got zero bug reports for missing held messages).
I finally found the time to debug the problem, because the failures in themselves were cryptic and common enough to cause our operations people headaches. So I cowboyed in some additional capture code and ran it for 24 hours. Guess what I found?
We were essentially crapping out on /tons/ of messages with 8-bit in headers, and these messages were basically getting dropped on the floor. Why no bug reports? Because /every/ single captured message was spam. How's that for a bug having unintended positive consequences?
-Barry
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