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Email and domains

How business email, domain names and DNS work, explained in plain English.

Traffic light showing a red stop signal under a blue bicycle signalQuestionEmail and domainsDMARC p=none vs quarantine vs reject, which should I use?p=none tells receivers to deliver failing email as normal and just send you reports. p=quarantine sends failing email to spam. p=reject blocks it completely. Start at none, read the reports until every service you use passes, then move to quarantine and finally reject. Skipping straight to reject can block your own invoices.12 October 2026Magnifying glass and pen resting on printed spreadsheets, ready to check the detailsQuestionHow do I check if my domain has DMARC?12 October 2026Open red mailbox with a stream of envelopes flying away from it, like email going astrayQuestionWhy are my emails going to spam?12 October 2026Hands typing on a keyboard as email envelopes fly outTutorialHow to set up SPF, DKIM and DMARC for your business emailAdd three DNS records in this order. First an SPF record listing who can send email for your domain, then a DKIM record your email provider generates, then, about 48 hours later, a DMARC record starting at p=none. Watch the DMARC reports for a few weeks before tightening the policy to quarantine.11 October 2026