> 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.