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Question is in the title. What are the specific steps involved?

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2 Answers 2

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As I know today that is not possible. Wordpress.com uses Askimet to protect you from spam.

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  • It is also more reliable.
    – phwd
    Commented Jul 1, 2010 at 16:25
  • Askimet is the worst thing you can do in the sense of data security. It just sends everything home. Oh and you can try this: Adding a "spam"-looking comment using some e-mail address which you do not typically use. Wait for it as being marked as spam. Now you can't leave any comment using this e-mail address anymore (no matter from which computer and IP) on any blog using Askimet. Malicious people can use it to block your address.
    – neo
    Commented Jul 1, 2010 at 16:29
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    I don't think Askimet is bad at all, I like it. On my blog the accuracy rate is 99.448%. One 719 comments, it failed 4 times.
    – Drake
    Commented Jul 1, 2010 at 16:34
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There's a reCaptcha plugin for self-hosted WP sites. You cannot add plugins to WP.com sites.

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