>and where are all these newly-added set parameters documented?
 
>----------------------------Original message----------------------------
>I have tried a variety of commands/formats to eliminate the
>"dual" header I mistakenly thought I wanted.  What is the
>proper format for the command?
 
From the LISTSERV Reference Card:
 
Options for mail headers of incoming postings (choose one):
             FULLhdr or FULLBsmtp              -> "Full" mail headers
             IETFhdr                           -> Internet-style headers
             SHORThdr or SHORTBsmtp            -> Short (default) headers
             DUALhdr                           -> Dual headers, useful with PC
                                                  or Mac mail programs
 
Sooo
 
SET listname SHORT
 
or something else beside DUALHDR (which is mutually exclusive).