Email authentication

When to use: “Check SPF/DKIM/DMARC”, mail in spam, or you’re standing up a new sending domain.

What it does

Email authentication runs read-only DNS lookups for SPF, DKIM, DMARC (and related records like MX/PTR when relevant). It scores what’s published vs missing. It does not change DNS or ESP settings.

Try saying this

Mail is landing in spam or you just bought a sending domain

You

❯ Check SPF, DKIM, and DMARC for send.acme-outbound.com.

Agent ◆ Skill · email-authentication

I’ll look up DNS for SPF/DKIM/DMARC (and related records), score each factor, and tell you what’s missing — read-only; I won’t change DNS.

What you’ll get

• A per-factor scorecard (pass / warn / fail / unverified)
• Plain-language notes on what’s broken (e.g. missing SPF, multiple SPF records)
• No silent “all good” when a lookup failed — unverified stays unverified

Get started

No OutboundSync API key. Install:

npx skills add outboundsync/skills --skill email-authentication -g

More setup: Install skills. Lookup methods: skills/email-authentication/.