SPF, DKIM and DMARC for Kit (ConvertKit)

Short answer: Kit (ConvertKit) mail passes Gmail, Yahoo and Microsoft checks when you turn on DKIM with your own domain and publish a DMARC record at _dmarc (start with p=none). The exact records and clicks are below.

SPF	—	Not needed on your root domain: the `ckespa` CNAME gives Kit a return-path on your domain, so SPF passes and aligns there.
DKIM	CNAME / TXT	Two CNAME records Kit shows: `cka._domainkey` → `dkim.dm-xxxx.sgN.convertkit.com` (DKIM) and `ckespa` → `spf.dm-xxxx.sgN.convertkit.com` (return path). The targets are unique to your account.
DMARC	TXT at `_dmarc`	v=DMARC1; p=none; rua=mailto:dmarc@yourdomain.com Start with `p=none` and a mailbox you read, or a free report address that turns the reports into a dashboard; build your own.

Step by step

In Kit click Settings → Email and add your domain under Verified Sending Domains.
Try Set this up for me (automatic) first; otherwise copy the CNAME records Kit shows into your DNS.
Click Validate. It usually takes a few minutes.
No DMARC record yet? Add the one Kit offers (p=none) and validate it as well.

Mistakes that break it

Some DNS panels want only cka._domainkey and ckespa, not the full names. Bluehost doesn't accept the dots at all.
Deleting the CNAME records later breaks DKIM and SPF for all Kit mail.
Open rates can dip for two to three weeks after the switch while your own domain's reputation builds up.

Check that it worked

After the fix, keep an eye on it: free DMARC monitoring shows every service that sends mail as your domain and which ones fail, in plain English.

Rather not touch DNS? I set up SPF, DKIM and DMARC without breaking your other senders, with a before/after report.

Get it fixed on Fiverr

Prefer to do it yourself? Get the step-by-step Fix Kit ($15) – 19-page guide, checklist, 20+ providers.

Other setup guides

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