AWS Route 53 console: Hosted zones → click your zone → Create record. Record name = the subdomain (leave blank for root); Record type = TXT; Value = "v=spf1 include:_spf.google.com ~all" (Route 53 requires the value in double quotes); TTL = 300 seconds is a good default. Route 53 supports multiple values in one record — separate with newlines in the console. For DKIM records over 255 chars, Route 53 requires you to split into multiple quoted strings, one per line, like "first-half..." "second-half...". Verify with the DNS query tool.
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How do I add a TXT record in Route 53?
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DNS Record Types Explained
DNS records are the building blocks of how the internet resolves domain names to servers. Each record type has a specific job: routing web traffic, delivering email, proving domain ownership, or preventing spoofing.