I'm not sure if Anton can do this directly via DNS. Alternatively, it may be possible to point mathoverflow.net to mathoverflow.tqft.net for email purposes (there's a separate set of DNS entries for email), and then I could do the aliasing on my end. This might mess up existing email accounts @mathoverflow.net.
I guess I can just make up addresses under the .tqft.net domain if that's the best we can do.
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