SpamAssassin - Use this program to "Unspam" your mailbox(es).
Datadog - See metrics from all of your apps, tools & services in one place with Datadog's cloud monitoring as a service solution. Try it for free.
Rspamd - Rspamd is an advanced spam filtering system that allows evaluation of messages by a number of rules...
Dynatrace - Cloud-based quality testing, performance monitoring and analytics for mobile apps and websites. Get started with Keynote today!
Oikik Antispam - Oikik is a cloud-based email filtering service that works with your existing email service.
Zabbix - Track, record, alert and visualize performance and availability of IT resources