Custom triggers for specific content types?

Hi everyone,

This is a trigger module question, I believe. Does anyone know if there's any way to configure this module to only fire a given action on a certain type of content?

For example, I run a site that includes a blog, and would like to trigger an email to a mailing list whenever I write a new post. However, I'd like to exclude newly-created pages. Right now the trigger is working properly and sending the email, but it's going out for every bit of newly created content. It would be ideal to limit this to blog posts only.

Does anyone know if this can be done with the triggers module? Or barring that, any creative workarounds?

Best regards,
Brian