cdninstagram.com
At risk, with 3 things to fix
cdninstagram.com scored 18/100 (grade F). The main issues are no MX records and no DMARC record, plus 1 more.
Checked 2026-10-04 02:03 UTC · fresh check
Publish a DMARC record
Starts DMARC in monitoring mode (p=none), so you can see who sends as cdninstagram.com before enforcing a policy. Move to quarantine once the reports show only your own services.
_dmarc.cdninstagram.com
Some DNS providers want just “_dmarc” here.
v=DMARC1; p=none; adkim=r; aspf=r
How to apply it
- Sign in where your domain’s DNS is managed. This is often where you bought the domain, such as Cloudflare, GoDaddy or Namecheap.
- Add a new TXT record with the name and value above.
- Save, then come back and re-check. DNS changes can take up to a few hours to show.
All checks
MXCan servers find your inbox?No MX recordsFailing
- Fail: No MX records
cdninstagram.com has no MX records and no A/AAAA fallback, so it cannot receive mail, including bounces and DMARC reports. Publish an MX record pointing at your mail provider.
SPFWho may send as you?SPF ends in softfail (~all)Info
- Info: SPF ends in softfail (~all)
"~all" is common and works well with DMARC. "-all" is stricter; switch when you are sure every sender is listed.
DKIMAre your emails signed?No DKIM key found for the common selectorsNeeds attention
- Warning: No DKIM key found for the common selectors
None of the 47 selectors probed under cdninstagram.com publish a DKIM key. DNS cannot list selectors, so a key under a custom selector may exist: find the s= value in the DKIM-Signature header of a message you sent and check that selector. If DKIM is not set up, enable it at each service that sends mail for cdninstagram.com.
DMARCWhat happens to fakes?No DMARC recordFailing
- Fail: No DMARC record
There is no v=DMARC1 TXT record at _dmarc.cdninstagram.com. Without DMARC, receivers have no policy for mail that fails SPF and DKIM, and Gmail and Yahoo require one for bulk senders. Start with p=none and a rua address to collect reports.
How to fix this
AlignmentDoes it match your From?No issues foundPass
Nothing to report.
BIMICan inboxes show your logo?No BIMI recordInfo
- Info: No BIMI record
No BIMI record at default._bimi.cdninstagram.com. BIMI is optional: it shows your logo next to your mail in supporting inboxes once DMARC is enforced.
How to fix this
MTA-STSIs mail to you encrypted?No MTA-STS recordInfo
- Info: No MTA-STS record
No MTA-STS record at _mta-sts.cdninstagram.com. MTA-STS (RFC 8461) makes sending servers require TLS and a valid certificate when delivering to you, which blocks downgrade attacks.
TLS-RPTWill you hear about failures?No TLS-RPT recordInfo
- Info: No TLS-RPT record
No TLS reporting record at _smtp._tls.cdninstagram.com. TLS-RPT (RFC 8460) tells senders where to send daily reports about failed encrypted deliveries to you.
How to fix this
Other fixes
Set up a TLS report addressinstruction
Sending servers will report TLS failures when delivering to cdninstagram.com, which you need before enforcing MTA-STS. The address must accept TLS reports; a DMARC report address does not necessarily do so.
Applies to: _smtp._tls.cdninstagram.com
- Pick an address that will receive TLS reports: a mailbox you read (for example tls-reports@cdninstagram.com, created first) or a TLS reporting service. 2. Publish a TXT record at _smtp._tls.cdninstagram.com with the value v=TLSRPTv1; rua=mailto:<that address>.
Prepare BIMIinstruction
BIMI shows your logo next to messages in supporting inboxes, but only for mail that passes DMARC under an enforced policy.
Applies to: default._bimi.cdninstagram.com
- Enforce DMARC first: p=quarantine or p=reject at 100% (no pct below 100). 2. Convert your logo to an SVG Tiny PS file and host it over HTTPS, for example https://cdninstagram.com/bimi/logo.svg. 3. For Gmail and Apple Mail, obtain a VMC or CMC certificate for the logo. 4. Publish a TXT record at default._bimi.cdninstagram.com with v=BIMI1, l= set to the logo URL and a= set to the certificate URL.