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SMTP, SPF, DKIM, DMARC, TLS
Did you know anyone can send an email impersonating your email address? Back in 1971 when ’email’ was invented and later when it was connected to the Internet both email users knew each other. Since then spammers and other bad actors started to abuse this ‘feature’. And since then some new mechanisms have been added…
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Migrating VPS with virtualmin – Multiple DNS changes
We have had a customer move from one host to a new one with Virtualmin, this is usually ok, except in this case he had DNS hosted on his own VPS, most of it pointing to his old IP address. The task was to update all DNS records on his VPS without manually clicking each…