On Sun, 13 Jun 1999 08:20:12 -0400, Pete Weiss <[log in to unmask]> wrote: >Have said individual email the LISTSERV@listhost the command > >THANKS I suggest slightly more: THANKS INFO listname The answer to THANKS is returned (like many LISTSERV command responses) with a RFC821 MAIL FROM:<> (i.e. blank) which must be allowed (by RFC1123) but which some mail systems incorrectly block. The answer to INFO listname is returned with MAIL FROM:<owner-listname@host_name> (i.e. non-blank) which is definitely allowed. So if they get 0 responses something very bad such as domain name or IP blocking is going on. If they get only 1 response to INFO listname, then the ISP is blocking MAIL FROM:<>. If they get both responses, then all is well (for direct addressed mail) and the spam filter is perhaps blocking BSMTP mail.