It looks like the automatic restart is working. But the underlying problem remains.
Afer a restart... [Mon Aug 15 17:47:40.409406 2022] [mpm_prefork:notice] [pid 16147] AH00173: SIGHUP received. Attempting to restart [Mon Aug 15 17:47:41.241212 2022] [mpm_prefork:notice] [pid 16147] AH00163: Apache/2.4.29 (Trisquel_GNU/Linux) OpenSSL/1.1.1 configured -- resuming normal operations [Mon Aug 15 17:47:41.241352 2022] [core:notice] [pid 16147] AH00094: Command line: '/usr/sbin/apache2' postdrop: warning: mail_queue_enter: create file maildrop/338453.17005: Permission denied postdrop: warning: mail_queue_enter: create file maildrop/933049.17009: Permission denied postdrop: warning: mail_queue_enter: create file maildrop/339760.17005: Permission denied postdrop: warning: mail_queue_enter: create file maildrop/934393.17009: Permission denied ... Endless logs of mail failure. Which I don't yet understand. It would not be normal for the system to be sending mail at the rate that attempts are being logged. Also testing shows that email is working okay otherwise. Something is trying to send a lot of mail but fortunately failing. The access logs don't immediately point to a culprit. But at least it has been automatically restarted successfully and that is keeping the web site online. I continue to poke at things... Bob P.S. I really wish this were nginx instead of apache. Every time I am forced to deal with apache problems I feel like I am being punished for bad karma from a previous life. But maybe I am...