To catch client website and email problems early, monitor from outside the client’s network, test the important user journeys and sending signals—not just whether a homepage responds—and route confirmed alerts to someone who can act. Pair those checks with a client-facing status view and clear incident updates.
What should you monitor?
Start with what a client’s visitors or staff depend on. A basic uptime check can show whether a monitored endpoint responds, but it cannot prove that the site’s main purpose is working. A page may load while a lead form fails, checkout breaks, or important content disappears.
- Availability: Monitor public HTTP/HTTPS pages and API endpoints from outside the client’s network.
- Page content: Check for expected text or other signals that help catch a nominally successful response with an error page or missing content. GoodPing describes this as a way to detect failures a status code can miss.
- Critical journeys: Use synthetic transaction checks for workflows such as sign-in, checkout, or submitting a lead form.
- Performance: Add page-speed checks when slow loading is a meaningful client concern.
Pingdom documents uptime, page-speed, transaction, and API monitoring: Pingdom product features. GoodPing describes content and keyword checks: GoodPing.
Build a monitoring plan around each client’s risks
1. Inventory properties, critical paths, and owners
For each client, list the domains and services to monitor, the pages and workflows that matter, and the person responsible for each alert. Include any scheduled job whose failure would be consequential. Record who handles technical response and who communicates with the client; an alert without an accountable recipient is easy to miss.
#1 Best Overall
2. Check availability and behavior from outside
Set external checks for public sites and APIs, then add expected-response or content assertions where a successful HTTP response alone could be misleading. Add synthetic tests for the client’s highest-value workflows. Treat an uptime percentage as a summary of the provider’s checks over a particular measurement window—not a complete measure of site quality.
When comparing results, examine the monitored scope, test locations, interval, failure-confirmation method, and reporting window. The cited vendor pages document features, but do not provide a neutral, independently audited comparison of measurement accuracy.
Rank #2
3. Add checks for the site’s specific failure modes
Depending on the client’s architecture, useful adjacent checks can include TLS certificate and domain expiry, DNS changes, broken links, performance degradation, and cron or heartbeat monitoring. Select checks according to the consequences of failure: a marketing site, online store, and API-backed application do not have identical needs.
Oh Dear documents several of these site-health checks and client reports: Oh Dear. Montastic documents uptime, SSL, DNS, and network checks: Montastic.
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4. Monitor email authentication and delivery signals
For each sending domain, verify that DNS records cover authorized senders and the relevant authentication methods. Google recommends SPF, DKIM, and DMARC setup. Its current sender guidance says all senders to Gmail must use SPF or DKIM; senders exceeding 5,000 messages per day to Gmail have additional SPF, DKIM, and DMARC requirements. Google recommends keeping spam rates reported in Postmaster Tools below 0.10% and avoiding 0.30% or higher. These are Gmail-specific requirements and recommendations, not universal thresholds for every mailbox provider; consult Google’s Email sender guidelines for current details.
Google Postmaster Tools reports signals including authentication, spam rate, domain and IP reputation, and delivery errors for outgoing mail to personal Gmail accounts. Its dashboards are not real-time and may show no data on low-volume days, so they are not a real-time monitor of inbox placement across all providers. Google states that it does not track open rates. See Postmaster Tools dashboard documentation.
Rank #4
5. Confirm failures and send alerts to the right person
Choose alert channels based on the response workflow: possible options documented by these services include email, SMS, Slack, webhooks, and incident tools. Consider failure confirmation, recovery notifications, maintenance windows, and escalation delays to reduce avoidable noise. Cronitor says it verifies downtime from at least one additional region before alerting; that describes Cronitor’s documented process, not a guarantee about other services. Pingdom documents email and SMS alerts, while Cronitor documents regional confirmation and status pages.
For a client-facing view, consider a public or private status page, incident subscriptions, or scheduled reports. Oh Dear describes client-specific status pages and automated monthly reports. These features can help communicate service state; a status page does not itself resolve an incident.
How to update a client during an incident
Send a concise update that distinguishes observed facts from assumptions. Include:
- The affected service, page, or workflow.
- When your team first observed the issue.
- What is confirmed and what remains unknown.
- What action the team is taking.
- When the client should expect the next update.
Do not present a suspected cause as confirmed until evidence supports it. Keep the monitoring alert, technical response, and client communication responsibilities explicit so the issue does not sit between teams.
How to compare monitoring options
Compare services against the client work you actually need to cover. The cited product pages document different feature sets, but do not establish a definitive vendor ranking.
| Comparison area | Questions to ask |
|---|---|
| Coverage | Does it monitor HTTP/HTTPS uptime, expected content, synthetic journeys, APIs, DNS, TLS/domain expiry, cron or heartbeat jobs, and relevant email signals? |
| Detection method | What is the check interval and location coverage? Does the service confirm a failed probe before alerting? |
| Alert workflow | Can alerts reach the on-call person through the channels the team uses? Are escalation, maintenance windows, and recovery notifications available? |
| Client communication | Can you provide separate client status pages, reports, incident history, access controls, or subscriptions that suit the audience? |
| Evidence and limits | What is measured, over what reporting window, and with what data delay? Are claimed results independently verified or only documented by the vendor? |
Pingdom documents uptime, page-speed, transaction, and API checks with public status pages; Cronitor documents multi-region failure confirmation, alert routes, status pages, and email reports; Oh Dear documents broader site-health checks and monthly client reports. Choose by the coverage and response workflow the client needs rather than assuming any one tool proves the whole service is healthy.
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