I just installed the Listserv material on a UNIX 10.20 with sendmail. Problem is that when I run Listserv in the background it only works precisely at the hour. So at 14.00, 15.00, and so on. I have read a number of posts but I don't think it's sendmail as they say, because the jobs come and stay in my spool directory until the next full hour. Is there somewhere a sleeping time programmed? Can I change it? Hope somebody can help me. Roeland