What @harple said made me think about what I would like if I were an editor (which I am decidedly not, as everyone here who has ever read anything I write knows). I think that if you write an email with links to your writing, I would want you to tell me the story of your writing. I’d like it if you spent a short paragraph describing each piece, with the link to the piece in the first sentence of the paragraph.
However what I’d like is to have you present them in a way that you weave them together into a kind of integrated whole. Put them in some kind of sort order, possibly by topic, or possibly chronologically, but not necessarily. They should be in an order that helps each piece lead from one to the next and makes them stronger by tying them together in this way.
In the end, though, I want a story. Your stories should be stories, and the story about the stories should be a good story, too. It doesn’t matter what kind of samples we are talking about. Whether fiction, technical, legal, or sports writing, there’s a story behind the stories, and that is going to help you sell the stories, I believe.
But as I said above, I’m not an editor and I never edit, so what do I know? That’s my story, and I’m sticking to it!