Well, BCC, as you are doing there, is clearly the best way. It won't be a user-side action so you have no real worries about the speed of returning ~2,500 e-mails from the database.

What exactly are you asking? As in my opinion you're going about it right the way as it is.

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The man who comes back through the Door in the Wall will never be quite the same as the man who went out.