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DKIM Validator

Our DKIM Validator is a diagnostic tool that helps verify that the DKIM public key is correct prior to adding it to your DNS. The tool can help senders ensure they don’t have any DKIM-related authentication failures.

Our tools are under maintenance. Please try again later.

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Error

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Public key length

Notes

Warnings / Errors

Details

Tag

Name

Value

Default

None

Congratulations! Your DKIM record is valid.

There is something wrong with your DKIM record.

Query

Enter DKIM record

Validate DKIM

Legend
TAGNAMEDEFAULTTRANSLATION
vVersionDKIM1Version of the DKIM key record (plain-text; RECOMMENDED). This tag MUST be the first tag in the record if present. Warning: some ISPs may mark the DKIM authentication check as neutral if the version tag is invalid.
hHash algorithms* (allow all)Acceptable hash algorithms (plain-text; OPTIONAL). A colon-separated list of hash algorithms that might be used. Unrecognized algorithms MUST be ignored. The currently recognized algorithms are “sha1” and “sha256”.
kKey typersa Key type (plain-text; OPTIONAL). Unrecognized key types MUST be ignored. Supported values: “rsa”, “ed25519”.
nNotes(empty)Notes that might be of interest to a human (OPTIONAL). Not interpreted in any way.
pPublic key(none)Public-key data (base64; REQUIRED). An empty value means that this public key has been revoked. This is the only required tag.
sService type* (allow all) Service Type (plain-text; OPTIONAL). A colon-separated list of service types to which this record applies. Unrecognized service types MUST be ignored. Currently only “email” is recognized.
tFlags(no flags set)Flags (plain-text; OPTIONAL). A colon-separated list of names. Unrecognized flags MUST be ignored. The defined flags are as follows: “y” – this domain is testing DKIM (test mode) “s” – verifiers MUST check for domain alignment (strict mode)

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