Subject: Your feedback

Hey {{first_name}},
I noticed you’re really interested in [[topic]]. I’d even wager to say you’re something of an expert.
I was wondering if you’d mind taking a look at a post I just published about [[topic]]:
Could you please give me a little feedback on the post? I’d really appreciate you leaving a comment.
Either way, keep up the great work!
[[your name and title]]