The first time I went on the job market for a tt job both places I had in-person interviews with told me the salary I would be hired at during the visit. With the place I ended up at, I negotiated a small salary increase over email/phone. We also negotiated start-up over email which included moving expenses. Only the 9-month salary was included in my official offer letter from the university. All other aspects of the offer were in emails from my Department and the College (start-up, teaching load, etc.). I literally saw where my start-up would come from each year and how much the dollar amounts were, so I was reasonably sure that they would not stiff me. If you have another offer (or are waiting to hear from another place) you can use that to negotiate. I found it helpful for the salary negotiations, but I think I would have had the same start-up/teaching load either way.
Email negotiations are not ideal, but let's face it—that's the way this usually occurs once a phone call or in-person offer has been made. If you have no idea what your salary/start-up is, you are at a huge disadvantage in negotiations. You need to get that information from the Chair or Dean. In my case the Dept. Chair was happy to work with me on all negotiations and then made requests to the Dean. This was at a Carnegie R2/now R1 but not "tier 1" if that makes sense. I have no idea how this would work at a SLAC or other smaller place.