SpamAssassin rule
DKIM_ADSP_NXDOMAIN
From domain does not exist
+0.8 points
Header test
What DKIM_ADSP_NXDOMAIN means
There is no valid signature from the author's domain, and that domain does not exist in DNS.
The rule's description in SpamAssassin: “No valid author signature and domain not in DNS”
How to fix it
Send from a real, registered domain that has DNS records.
Does your email trigger DKIM_ADSP_NXDOMAIN?
Send it to a free test address: we run SpamAssassin, check SPF, DKIM and DMARC and show every rule with a fix.
Open the email spam checkerRelated rules
ARC_INVALIDARC signature is invalid
DKIM_ADSP_ALLDomain says it signs all mail, but this message is unsigned
DKIM_ADSP_DISCARDDomain asks to discard unsigned mail
DKIM_INVALIDDKIM signature is invalid
DKIM_SIGNEDMessage is DKIM-signed
DKIM_VALIDValid DKIM signature
DKIM_VALID_AUDKIM signature from your own domain
DKIM_VALID_EFDKIM signature from the envelope sender's domain
DMARC_MISSINGNo DMARC record
Frequently asked questions
What does DKIM_ADSP_NXDOMAIN mean?
There is no valid signature from the author's domain, and that domain does not exist in DNS.
How do I fix DKIM_ADSP_NXDOMAIN?
Send from a real, registered domain that has DNS records.
How many points does DKIM_ADSP_NXDOMAIN add?
0.8 points in the default SpamAssassin ruleset (network tests on, Bayes off). A message is treated as spam from 5.0 points. Mail servers can change scores locally.