It's not documented in the 1.8c manual but the beta 1.8d manual has
JOBVIEW.EXE (or jobview*)
JOBVIEW allows you to read the Base64-encoded spool files created by
LISTSERV (see below for the types of files created in the spool
directory that may be read with this utility). The syntax is simply
jobview file1 file2...
(and the types of files you can read are .JOB, .JOBH, and .ERROR)
Nathan