zmlocalconfig -e mailboxd_java_heap_memory_percent=30 zmmailboxdctl restart Subject: Zimbra Operation Alert – High Mail Queue

tail -f /var/log/zimbra.log tail -f /opt/zimbra/log/mailbox.log zmdiaglog -c # Collect diagnostic logs Renew or deploy SSL certificates:

postqueue -p # Show mail queue postsuper -d ALL # Delete all queued messages zmqcontrol status # Queue control status Full backup (redolog must be enabled):