Email Deliverability Check
Send one test email from the service you normally use. We'll run ten checks on the message that reaches us and show what passed and what needs attention.
Works with
What we check
spf_aligned
SPF is a public list of servers allowed to send email for your domain. This row passes when the delivering server is on that list, and the list belongs to the same domain as the visible From address.
dkim_aligned
DKIM is a digital signature on the message. This row passes when the signature is valid and the signing domain matches the visible From address.
fcrdns
Forward-confirmed reverse DNS means the sending IP has a hostname, and that hostname points back to the same IP. Inbox providers use this to confirm a real mail server.
opportunistic_tls
The connection from the delivering server into us used encryption. We cannot see whether earlier steps used it.
allowed_from_domain
Send campaigns from a domain you own. This row fails for gmail.com, yahoo.com, outlook.com, hotmail.com, and icloud.com.
from_mx
MX records are the public list of servers that receive mail for a domain. This row checks that the From domain has usable MX records so replies have somewhere to go.
dmarc
DMARC is a public DNS record that tells inbox providers what to do when neither SPF nor DKIM matches the visible From address. This row passes when we find that record. We do not grade the policy.
aligned_auth
This row passes when SPF or DKIM passes and uses the same main domain as the visible From address. One of the two is enough.
rfc8058_one_click
One-click unsubscribe is two headers. List-Unsubscribe holds an HTTPS link. List-Unsubscribe-Post is set to List-Unsubscribe=One-Click.
in_body_unsubscribe
We look in the body for the word unsubscribe, or for any HTTPS link. An unrelated link can pass this row.
FAQ
What does the score mean?
The score is how many of the ten checks passed on the message we received. Open the report to see each row.
Why send an email?
Several checks need the sending server and the headers on a real message. A domain lookup cannot show that.
Does a perfect score guarantee the inbox?
No. A perfect score means this message passed the ten checks we run. Inbox placement also depends on reputation and content that we do not score.
What happens after I send?
The report opens on the Gmail, Yahoo, and Outlook checks for this message. The other tabs stay on the same report.