What does UptimeMatrix monitor?

UptimeMatrix monitors websites, APIs, servers, SSL certificates, domain expiry, ports, blacklists, and more. We provide comprehensive infrastructure monitoring from 60+ global locations with instant alerts via email, SMS, Slack, and webhooks.

Is UptimeMatrix free?

Yes! UptimeMatrix offers a Free Forever plan with 5 monitors, 5-minute check intervals, and 30-day data retention. No credit card required. Paid plans start at $7/month (annual billing) for faster intervals and higher capacity.

How often does it check uptime?

Free plans check every 5 minutes. Paid plans support 1-minute check intervals. You can customize check intervals from 1 minute to 24 hours based on your plan and monitoring needs.

What alert channels are supported?

UptimeMatrix supports email, SMS, phone calls, Slack, Discord, Microsoft Teams, PagerDuty, webhooks, and custom integrations. All notification channels are available on every plan—no artificial limitations.

Does it support server monitoring?

Yes! UptimeMatrix monitors server health including CPU, memory, disk space, network performance, and processes. We support Linux, Windows, and cloud servers with real-time metrics and alerts.

Do you provide public status pages?

Yes! Create beautiful, customizable public status pages to communicate incidents, maintenance, and uptime to your customers. White-label options available for enterprise plans.

Where are monitoring nodes located?

UptimeMatrix operates 60+ monitoring locations worldwide across North America, Europe, Asia, and Australia. This ensures accurate regional performance insights and helps detect location-specific issues.

Yes! UptimeMatrix supports comprehensive API monitoring including REST APIs, GraphQL, custom headers, authentication, request body validation, response time tracking, and JSON schema validation.

Wiki

What Is IP Blacklist Monitoring?

Updated 2026-04-05 · Published 2026-04-01

Direct answer

IP blacklist monitoring checks whether your sending IP addresses appear on email blocklists (DNSBLs/RBLs) used by ISPs and mail filters. Listing can severely harm deliverability even when your application is otherwise healthy.

Key points

Causes: Spam complaints, compromised accounts, misconfigured relays, shared IP neighbors, or sudden volume spikes.
Detection: Queries against major lists and reputation aggregators; interpretation varies by list policy.
Remediation: Identify the root cause, fix authentication and sending practices, then request delisting per list rules—not by repeatedly toggling DNS without fixing the issue.

Relationship to email monitoring

This is about reputation, not inbox rendering. Pair with SPF/DKIM/DMARC alignment and bounce/complaint monitoring for a complete picture.

Limitations

Lists differ in severity and adoption; a hit on a niche list may matter less than a widely used DNSBL. Always prioritize customer-impacting providers.

Frequently asked questions

How fast can listings change?

Quickly after abuse signals; some lists auto-expire after clean behavior, others need manual review.

Does monitoring remove listings?

No—it alerts you early so your deliverability team can act.