I received an email from Kevin thanking me for my post about Aleksandr [1] and how he was able to stop the spam. But Keven had some issues with the proposed solution and how it didn't work directly for him. On close inspection of the post in question, I did find an issue with the regular expression presented in the post—it wasn't correct. The problem stemmed from my use of a bespoke markup language I created [2] (that I should talk about at some point) where a character that should have been escaped, wasn't, causing the text to be misleading.
I fixed the issue and thanked Kevin for bringing the problem to my attention, even if it was in a roundabout way.
And to think, three years later [3] and “Aleksandr” is still spamming people for some obscure reason.