HEADER finding
No Authentication-Results header
No Authentication-Results header was found. The receiving MTA did not record its SPF, DKIM or DMARC evaluation.
Finding code
no_authentication_results
This finding appears in the findings array of
the spam checker and
the POST /v1/sender API response when the
condition above is detected.
How to fix it
The fix.
The receiving server did not add an Authentication-Results header. This header is added by the inbound MTA, not the sender. If you are testing your own mail, check that your receiving server evaluates SPF, DKIM and DMARC.
Related HEADER findings
Other things we check.
| Finding | What it means |
|---|---|
missing_message_id
|
Missing Message-ID header |
missing_date_header
|
Missing Date header |
missing_list_unsubscribe
|
Missing List-Unsubscribe header |