MailerLite Domain Authentication Failed
Quick answer
Authentication usually fails because a DNS record is copied wrongly: a doubled domain in the DKIM CNAME, more than one SPF record, or a wrong host name. Fix the record and click Check DNS records.
Most likely fix: Fix the DKIM CNAME
How to fix it
Try these in order — the most common fix is first.
1. Fix the DKIM CNAME
- Set Name to litesrv._domainkey and let your DNS provider add the domain
- If it doubles the domain in the Value, end the value with a period (litesrv._domainkey.mlsend.com.)
- Compare the record character by character with the one on the Domains page
Did this fix it?2. Fix SPF
- Keep only one SPF record per domain: merge includes into one and delete the others
- Use @ or leave Name blank for the root domain
- Stay under 10 DNS lookups and split values over 255 characters into strings
Did this fix it?3. Fix the verification TXT
- Paste the full value without truncation
- Use the root domain as the host (blank, @ or your domain depending on provider)
Did this fix it?4. Wait and recheck
- DNS usually updates within 24 hours and can take up to 72
- Look records up with a public DNS checker
- Click Check DNS records; ignore a failure email if the page already shows Authenticated
Did this fix it?
Symptoms
Domains page shows DKIM or SPF not verified, or you got a Failed authentication email.
Why it happens
- DNS provider appends your domain to the CNAME name or value
- More than one SPF TXT record on the domain
- SPF value edited or case changed, or longer than 255 characters per string
- Verification TXT record truncated or on the wrong host
- DNS changes not propagated yet
This guide also covers
- mailerlite domain authentication failed
- mailerlite dkim not verified
- mailerlite spf record error
- mailerlite domain not authenticating
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