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HTTP Status Code Basics: What 200/301/403/500 Actually Mean for Maintenance Tools

WordPress site maintenance constantly involves one basic question: after an update, is the site still working? Instead of relying on a human eyeballing a page and deciding "looks fine," most tooling…

  • 200 OK indicates successful request with normal content returned
  • 301 Moved Permanently redirects to new URL, used in WordPress URL changes
  • 500 Internal Server Error signals server-side failure during maintenance

CPU Looks Fine but the VDS Is Slow: A Linux Incident Runbook

A user reports that an application is slow or intermittently unreachable. The monitoring dashboard shows 20% CPU, memory still available, and no obvious outage.

  • User reports intermittent application slowness or unreachability
  • Analyze CPU usage per vCPU, not just percentage
  • Check memory pressure, not just available memory

How Do Verified Sending Domains, Webhooks, and Logs Work in an Email API?

These three pieces are what let you run email through an API instead of your own mail server: domain verification proves you're allowed to send as your domain, webhooks push you real-time events…

  • Verified Sending Domains authenticate emails via SPF, DKIM, and DMARC.
  • Webhooks deliver real-time notifications for email events like delivery and opens.
  • Logs provide a searchable record of each email's journey with metadata.

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