I understood from the dnsblog man page that each dnsblog process only lives for a "limited amount of time". I noticed this because I have over 50 dnsblog processes running on a fairly light duty postfix server. Some of them are over a week old. At first I thought they must have been orphaned, but looking through maillog, I find entries in the last few minutes from the oldest and the newest. I didn't check all of them, but it appears they are all in use. Looking at the source for postfix-3.3-20180114 (on web), it appears dnsblog checks one IP address and then exits. I believe I can limit the number of dnsblog processes in master.cf (currently set to 0), but I am not sure that is a good idea. How long are these processes supposed to live?
-- Doug
