I noticed that this question was deleted; I'm not sure why that happened. To be clear, it's not about the rep lost.
The question itself isn't very exciting, it just wonders why certain emails seem to get stuck in spam filters and based on the given code that's not surprising.
What did surprise me was this seemingly out-of-place comment from ChrisF:
Please don't vandalise the post like that.
Two minutes later the question was deleted by casperOne.
I went through the revisions, but I didn't see any edits or rollbacks by anyone else since it was asked in Oct '12.
So what happened here?