There are many wonderful offline mail readers that will run
  perfectly on the HX (especially with two floppy drives!). My
  suggestion (Internet purists will not like this suggestion, but
  it works well on the HX) is to download Bluewave 3.13. *It is
  wonderful for BBS usage, and will also work with Internet hosts
  that have "uqwk" installed. And it's fast and colorful too! :-)
  *I used it on a Zenith laptop at college which was an 8086 w/two
  720K floppies - one was the DOS diskette (which the HX doesn't
  need anyway :-> ) and the other contained Bluewave and a
  telecommunications program. *(Kermit or Procomm Plus, I don't
  remember anymore)