I get a fair number of emails (often press release blasts) to my public address, contactgnxp -at- gmail -dot- com. Of these a non-trivial are requests for papers. If I have access to a paper I always send that paper. That being said I’ve confused some of these emails for publicist-junk mail and what not. So if you want a paper please do this:
1) Put the paper name in the title, perhaps with the preamble “paper request:”
2) Put the link to the paper in the body. You don’t need to put anything else besides the link, I always will send the paper if I have access to it. If I don’t respond to you immediately, there are two reasons. I’m busy and am not checking my public email, or, I don’t have access.
Though projects like Haldane’s Sieve is making this less of an issue, it does seem like high profile empirically oriented publications of interest are still moving toward Nature and Science.