If your business emails keep landing in spam folders, or bouncing entirely, the answer is usually one of three DNS records that most people have never configured. None of them are complicated once you know what they’re for.
SPF: who’s allowed to send as you
SPF (Sender Policy Framework) is a list of servers authorized to send email on behalf of your domain. Without it, receiving mail servers have no way to tell your real emails apart from someone spoofing your domain.
DKIM: a digital signature for your email
DKIM (DomainKeys Identified Mail) attaches a cryptographic signature to outgoing email that proves it wasn’t altered in transit and genuinely came from your domain. It’s the part that says “this is authentically from us,” not just “sent from an approved server.”
DMARC: what to do when something fails
DMARC tells receiving mail servers what to do with messages that fail SPF or DKIM checks — reject them, quarantine them, or let them through anyway — and can send you reports when spoofing attempts happen.
Why this matters even for a small business
Deliverability problems don’t announce themselves — you just quietly notice fewer replies than expected. Setting these three records up correctly is one of the highest-impact, lowest-effort fixes available for business email.
This is exactly the kind of setup we handle when we configure business email on a domain — it’s a one-time setup, not something you have to maintain.