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by fookyong 5832 days ago
how?

DNS will resolve to posterous' servers. It's out of your old server's control by that point.

Unless you're talking about different domains, e.g. moving from

mycoolblog.com self hosted -> myawesomeblog.com on posterous

in that case you could do what you said, but I don't think that's what the OP is talking about. the issue is when you use the same domain on both.