Fixes, not fluff. DNS security and compliance guides for IT managers who already know the acronyms.
SPF record syntax from v=spf1 through -all: includes, lookup limits, permerror traps, and provider templates. The reference we use before editing any production TXT record.
Copy-paste SPF templates for Microsoft 365-only mail, M365 plus Mailchimp or HubSpot, and hybrid setups. Cloudflare and GoDaddy publish steps included.
SPF PermError stops SPF evaluation entirely, breaking deliverability and DMARC alignment. Fix syntax errors, merge duplicate TXT records, and stay under the 10 DNS lookup limit.
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