Useful Resources
Gartner Magic Quadrant for Contact Center as a Service

Gartner Magic Quadrant for Unified Communications as a Service

Gartner 2021 Magic Quadrant for Network Firewalls

Gartner 2021 Magic Quadrant for Endpoint Protection Platforms

Gartner 2021 Magic Quadrant for WAN Edge Infrastructure

Useful Links:
- Domain Lookup: whois.net
- American Registry for Internet Numbers (ARIN): arin.net
- Email Black-List Lookup: spamhaus.org
- Test Your SMTP Mail Server (MX): wormly.com
- Email Header Analyzer: mxtoolbox.com
- Check Carrier/Provider Network Health: downdetector.com