• SMTP Monitoring Uncovered: How Does It Work?

    Email failures are easy to miss until they hurt. Messages queue silently, transactional emails arrive late, or never show up at all, and users assume your product is broken. SMTP issues rarely trigger obvious alarms on their own. This post explains SMTP monitoring from an operational perspective. It covers how mail delivery actually fails, what […]

  • A Deep Dive into the HTTP 999 Status Code

    A 999 status code usually shows up when a request gets blocked, not when a server crashes. Your site looks fine, but crawlers, bots, or monitoring checks suddenly fail. That mismatch makes troubleshooting slower than it should be. This post explains what HTTP 999 actually means, why it exists outside the official spec, and which […]

  • SLA vs. SLO vs. SLI: What’s the Difference?

    When it comes to managing services effectively, terms like SLA, SLO, and SLI are often thrown around like confetti at a parade. They’re in meetings, in documents, and even in casual office conversations. But if you’re new to the field or simply haven’t had the chance to dig into these acronyms, they can feel like […]

  • HTTP Status Codes Uncovered: Your Ultimate Guide

    Did you like our previous blog about domain hijacking? Let’s see if you know all the HTTP codes now.  Decoding HTTP status codes HTTP status codes, typically a sequence of three numbers, are a reply from the server in response to a request made by a web browser. A common example many might recognize is […]

UptimeRobot Newsletter.

Stay ahead in DevOps! Get the latest insights, top tools, best practices, and more delivered straight to your inbox.