Ideas & practice
Automation, digital systems and analytics — notes from real work with companies.
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.
Somebody is sending email in your company's name: how to stop it
Fake invoices with your domain in the sender. Why it is possible, how to find out who is doing it, and the sequence that closes the door without blocking your own mail.
Why your email lands in spam: seven real causes
Quotes and invoices that never arrive. The actual causes in order of frequency, how to recognise each, and which are fixed in an afternoon.
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.
Moving mailboxes without losing the archive
Changing mail provider while bringing ten years of history, folders and attachments along. How the synchronisation works, the second pass, and how long to keep the old server on.
SPF, DKIM and DMARC: why a small company has to care now
Google, Yahoo and Microsoft stopped being gentle with unauthenticated email. What the three records are, the order to fix them in, and the mistake that stops your invoices.
Self-hosted business email: when it truly pays off (and when it doesn't)
Data control, GDPR and predictable costs versus cloud convenience — an honest guide to running mail on your own servers.