Guides
Intermediate
Guides
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How to move a WordPress site to a new host
Copy the files and database, test on the new server before anyone else sees it, then switch DNS with the old host kept as…
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How to set up SPF, DKIM and DMARC
Three DNS records that prove your email is really from you, so it reaches inboxes and nobody else can send as your domain.
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How much RAM and CPU does a website need?
Rough starting sizes for common sites, why memory runs out before CPU, and how to measure what your own site actually uses.
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How to fix ERR_SSL_PROTOCOL_ERROR
The browser and server could not agree on a secure connection at all. Usually HTTPS is not set up on that port, or the…
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Why do my emails go to spam?
Most legitimate mail lands in spam for fixable reasons: missing SPF, DKIM or DMARC, a server with a poor reputation, or a site sending…
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How to fix “Error establishing a database connection”
WordPress cannot reach its database. Either the login details are wrong, the database server is down, or the database itself is damaged.
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How to fix ERR_CONNECTION_REFUSED
The server answered, but nothing was listening on that port. Usually the web server is stopped, listening elsewhere, or a firewall rejects you.
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How to fix ERR_TOO_MANY_REDIRECTS
Two rules are sending visitors back and forth forever. Usually HTTP and HTTPS, or www and non-www, set differently in two places.
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How to fix 429 Too Many Requests
A rate limit was hit. Slow down if you are the visitor; if you run the site, decide whether the limit is protecting you…
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How to fix 503 Service Unavailable
The server is up but refusing work for now: maintenance mode, an overload, or a limit being hit. How to tell which, and clear…