Ideas & practice
Automation, digital systems and analytics — notes from real work with companies.
Changing hosting without downtime: how it is actually prepared
A move done properly goes unnoticed. TTLs, a staging environment, double mail synchronisation, and the order of operations that removes the outage window.
Email stopped arriving after Cloudflare: what to check, in order
Nameservers moved and the mail vanishes. The forgotten MX records, the orange cloud on the wrong record, and how to put it right in half an hour.
An .it domain and Cloudflare: what can move and what cannot
Cloudflare does not register .it domains, but it can run their DNS. The difference between registrar and nameservers, and how to make the switch without breaking email.
The SPF ten-lookup limit: what it breaks and how to get back under it
An SPF record may make at most ten DNS queries. Past that ceiling it does not fail loudly — it quietly degrades delivery. How to count them and how to get back under.
How long DNS propagation takes (and why it is rarely to blame)
"48 hours of propagation" is a phrase for making a wait sound normal. What actually happens when you change a record, how to read the TTL, and what to do when the site does not come back.