> LISTSERV  always  matches  without   the  period.  This  period/no-period
> business  doesn't  really make  any  sense,  and  the only  reason  LMail
> supports it  is for compatibility with  XMAILER (to avoid loops  and lost
> mail). There  is no such  risk with LISTSERV,  so the period  business is
> ignored  and LISTSERV  matches  the  entry whether  or  not  a period  is
> present.
 
I believe that XMAILER did away with the period/no period distinction
some time ago.  It is important that an entry for BAR.EDU not match the
domain FUBAR.EDU. That used to happen with XMAILER (without the
period), but it was fixed at the same time.