WordPress tells you the mail was sent. The customer never got it. This is a working guide to the four places WordPress email deliverability actually breaks: PHP mail() transport, SPF lookup limits, DKIM alignment, and DMARC policy. Includes real diagnostic commands, a troubleshooting order, and what changed now that DMARC has moved onto the IETF standards track.
The dashboard is fine for editing a post. It is a terrible tool for anything touching a thousand rows, twelve plugins or two servers. Here are the WP-CLI commands that save hours on migrations, plugin conflicts, stalled cron and integrity checks, grouped by the job that eats the time, with the failure modes each one hides.
Managed WordPress hosting and a self-managed VPS can both serve a fast site. They differ on which failures land on you. A practical comparison covering visit metering, disallowed plugin policies, silent backup failure, patching debt, and a cost model that survives contact with reality.
MySQL was gone in the morning because the kernel picked it to reclaim memory from Redis. Redis ships configured as a durable datastore, and you are using it as a cache. Setup takes ten minutes; the gotchas are memory limits, shared namespaces and the one enormous key nobody mentions.
You got PageSpeed Insights to 98 and six weeks later Search Console still says the same URLs are failing. The score and the assessment measure different things, and Lighthouse cannot measure INP at all. Here is how to fix Core Web Vitals on WordPress in the order that actually moves the report.
Your homepage loads instantly and your dashboard takes eight seconds. That is not a contradiction: wp-admin is the only part of your site that never gets cached. Here is where the time actually goes, in the order worth checking.
A plugin quietly reverts after every deploy and nobody knows why. That is what happens when Git and wp-admin both think they own the file tree. Here is how to build a deployment workflow where the repo is the source of truth and the database only ever travels one way.
Moving a WordPress website involves much more than copying files. This practical migration guide explains how to transfer WordPress safely, minimize downtime, protect SEO, preserve email services, and avoid lost data.
Learn how to debug WordPress like a professional. Discover how to fix common WordPress errors, optimize performance, improve security, troubleshoot plugins, themes, databases, and server issues with this complete step-by-step guide.