C
Scanned 1 hour ago. Re-scan for a fresh result after a fix.
Issues to fix
Results
01Mail exchangers (MX)A
pass
1 MX record(s) found.
records
| preference | exchange | ttl |
|---|---|---|
| 0 | . | 3600 |
info
Null MX (0 .): the domain explicitly does not accept mail.
02SPFA
pass
SPF record present.
record v=spf1 -all
pass
SPF uses 0 of the 10 permitted DNS lookups.
lookups 0
pass
-all default policy.
03DKIMA
info
No DKIM selector found via common probes (a _domainkey subtree exists but no common selector matched), the domain may use a custom selector.
04DMARCC
fail
No DMARC record: receivers have no policy for handling unauthenticated mail.
05DNS healthA
06BlacklistsA
pass
stonebridgeco.com is not listed on Spamhaus DBL.
target stonebridgeco.com
list Spamhaus DBL
pass
stonebridgeco.com is not listed on Spamhaus ZRD.
target stonebridgeco.com
list Spamhaus ZRD
07Bulk sending readinessA
warn
Partial bulk-sender setup, missing DKIM, DMARC. Gmail/Yahoo and Microsoft require all three for 5,000+ messages/day.
spf true
dkim false
dmarc false
threshold 5,000 messages/day
info
One-click List-Unsubscribe is a message-level header. Verify by sending a test message.
08MTA-STSA
09BIMIA
info
No BIMI record. No brand logo is published for inboxes with BIMI support.
BIMI draft
About this report
This report grades the email and DNS setup of stonebridgeco.com against the relevant RFCs. Each check links to the standard behind the rule. A high grade means the common causes of spoofing and poor deliverability are covered. A grade is not a guarantee that every message reaches the inbox.
Frequently asked questions
What does the grade mean?
The grade summarizes how completely the domain implements the core email authentication and DNS standards. A and B mean the main protections (SPF, DKIM, DMARC, valid MX) are in place. Lower grades flag gaps that make spoofing easier or hurt deliverability. A missing MX record caps the grade at F, a weak SPF all-qualifier caps at D, and no DMARC caps at C.
How fresh is this report?
A report is a snapshot from when it was last scanned, kept as a shareable link. If you are fixing your setup, use the Re-scan button to run every check live again.
Why is the SMTP section still loading?
The live SMTP probe connects to the mail servers from a dedicated prober, which takes a few seconds and runs separately from the DNS checks. The results stream in when ready. If SMTP was not requested for this report, that section stays empty.
I own this domain and want to stop scan.mx checking it.
Domain owners can block scanning by publishing a DNS TXT record; see the opt-out page.