NBEMS is the only application that would meet your DEC's requirements,
find it within the latest implementing of FLDIGI. It contains ARQ
PSK31, ARQ MFSK16 and a few other modes. Also facilitates email
exchanges on a point to point basis with the ability to drop email off
in to the Internet. It
Andy,
While you could use different systems, it gets very, very complicated
for non-digitally oriented hams. Just take some one who has never used
this stuff and really is not all that interested, but needs to use it
anyway and you will see how challenging it can be, HI.
Winlink 2000, even