The term “cold email” refers to emailing someone who you’ve never spoken to before. There are lots of guides on writing cold emails. This one is a bit niche, as it’s about cold emailing a particular person: me. But I guarantee you that it’s the best guide you can find on this hyperspecific topic. I’m publishing my guidelines under the Creative Commons BY-4.0 license, so you’re welcome to reuse or adapt them to guide people in emailing you.