Manage your subscription at http://listserv.unl.edu.
listserv.unl.edu lists do not accept incoming email from Yahoo.com, AOL.com or Dropbox.com due to their DMARC policies.
At some point in the past, the fire alarm went off while we were at that site. It was November, coldish, and we hung around outside for a bit -- no big deal from my point of view, but memorable. :)