B
Scanned 14 days ago. Re-scan for a fresh result after a fix.
Issues to fix
- warnSPF does not include Zoho Mail's sending hosts (zoho.com), so Zoho Mail mail may fail SPF.→
- warnp=none: monitoring only, unauthenticated mail is not blocked.→
- warnFCrDNS mismatch: 136.143.183.44 -> mx3.zohomail.com does not resolve back to the same IP.→
- warnFCrDNS mismatch: 204.141.33.44 -> mx8.zoho.com does not resolve back to the same IP.→
- warnSelector zoho key is ~1024-bit, rotate to 2048-bit.→
- warnpct=100 is deprecated in DMARCbis, apply the policy to all mail.→
- warnSOA has misconfigured values: minimum (negative-cache) TTL 60s is outside 300..86400s.→
- warnNo TLS-RPT reporting address. TLS delivery failures go unreported.→
- warnBanner hostname does not match reverse DNS.→
Results
01Mail exchangers (MX)A
pass
3 MX record(s) found.
records
| preference | exchange | ttl |
|---|---|---|
| 10 | mx.zoho.com | 300 |
| 20 | mx2.zoho.com | 300 |
| 50 | mx3.zoho.com | 300 |
02Mail providerB
info
Mail provider: Zoho Mail.
provider zoho
warn
SPF does not include Zoho Mail's sending hosts (zoho.com), so Zoho Mail mail may fail SPF.
expected zoho.com
03SPFA
pass
SPF record present.
record v=spf1 include:zohomail.com ~all
pass
SPF uses 2 of the 10 permitted DNS lookups.
lookups 2
pass
~all default policy.
04DKIMA
warn
Selector zoho key is ~1024-bit, rotate to 2048-bit.
selector zoho
record v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQ…IDAQAB
bits 1024
info
DKIM2 reuses these same selector._domainkey records and advertises no capability, so support cannot be detected from DNS. The 1 published key(s) carry over as they are. Adding an Ed25519 key (RFC 8463) prepares for it.
draft-ietf-dkim-dkim2-spec
keys 1
ed25519 false
05DMARCA
pass
DMARC record present.
record v=DMARC1; p=none; rua=mailto:dsg@dsgtransportllc.com; ruf=mailto:dsg@dsgtransportllc.com; sp=none; adkim=r; aspf=r; pct=100
warn
p=none: monitoring only, unauthenticated mail is not blocked.
p none
rua true
warn
pct=100 is deprecated in DMARCbis, apply the policy to all mail.
06DNS healthB
warn
FCrDNS mismatch: 136.143.183.44 -> mx3.zohomail.com does not resolve back to the same IP.
host mx.zoho.com
ip 136.143.183.44
ptr mx3.zohomail.com
forward 204.141.43.44
warn
FCrDNS mismatch: 204.141.33.44 -> mx8.zoho.com does not resolve back to the same IP.
host mx2.zoho.com
ip 204.141.33.44
ptr mx8.zoho.com
forward 204.141.43.44
pass
3 nameservers published.
count 3
warn
SOA has misconfigured values: minimum (negative-cache) TTL 60s is outside 300..86400s.
mname ns1.systemdns.com.
rname hostmaster.systemdns.com.
refresh 10800
retry 3600
expire 1209600
minimum 60
issues minimum (negative-cache) TTL 60s is outside 300..86400s
info
Zone is not DNSSEC-signed.
07BlacklistsA
pass
136.143.183.44 is not listed on SpamCop.
target 136.143.183.44
list SpamCop
pass
204.141.43.44 is not listed on SpamCop.
target 204.141.43.44
list SpamCop
pass
136.143.183.44 is not listed on GBUdb Truncate.
target 136.143.183.44
list GBUdb Truncate
pass
204.141.33.44 is not listed on GBUdb Truncate.
target 204.141.33.44
list GBUdb Truncate
pass
136.143.183.44 is not listed on PSBL.
target 136.143.183.44
list PSBL
pass
204.141.33.44 is not listed on SpamCop.
target 204.141.33.44
list SpamCop
pass
204.141.43.44 is not listed on GBUdb Truncate.
target 204.141.43.44
list GBUdb Truncate
pass
136.143.183.44 is not listed on Spamhaus ZEN.
target 136.143.183.44
list Spamhaus ZEN
pass
204.141.43.44 is not listed on PSBL.
target 204.141.43.44
list PSBL
pass
204.141.33.44 is not listed on PSBL.
target 204.141.33.44
list PSBL
pass
204.141.43.44 is not listed on Spamhaus AuthBL.
target 204.141.43.44
list Spamhaus AuthBL
pass
204.141.33.44 is not listed on Spamhaus AuthBL.
target 204.141.33.44
list Spamhaus AuthBL
pass
dsgtransportllc.com is not listed on Spamhaus ZRD.
target dsgtransportllc.com
list Spamhaus ZRD
pass
204.141.33.44 is not listed on Spamhaus ZEN.
target 204.141.33.44
list Spamhaus ZEN
pass
136.143.183.44 is not listed on Spamhaus AuthBL.
target 136.143.183.44
list Spamhaus AuthBL
pass
dsgtransportllc.com is not listed on Spamhaus DBL.
target dsgtransportllc.com
list Spamhaus DBL
pass
204.141.43.44 is not listed on Spamhaus ZEN.
target 204.141.43.44
list Spamhaus ZEN
08Bulk sending readinessA
pass
SPF, DKIM and DMARC are all present: the domain meets the Gmail/Yahoo and Microsoft bulk-sender authentication requirements (5,000+ messages/day).
spf true
dkim true
dmarc true
threshold 5,000 messages/day
info
One-click List-Unsubscribe is a message-level header. Verify by sending a test message.
09TLSA
info
No DANE/TLSA records. DANE is not deployed for these mail servers.
hosts mx.zoho.com, mx2.zoho.com, mx3.zoho.com
pass
Negotiated TLSv1.3.
tls_version TLSv1.3
host mx.zoho.com
pass
Certificate valid for 145 more day(s).
not_after 2027-01-29T23:59:59+00:00
host mx.zoho.com
pass
Certificate covers mx.zoho.com.
names *.zoho.com, zoho.com
host mx.zoho.com
pass
Server presented a 2-certificate chain.
chain_len 2
host mx.zoho.com
10MTA-STSA
11BIMIA
info
No BIMI record. No brand logo is published for inboxes with BIMI support.
BIMI draft
SMTP (live probe)
info
No DANE/TLSA records. DANE is not deployed for these mail servers.
hosts mx.zoho.com, mx2.zoho.com, mx3.zoho.com
pass
3 of 3 MX host(s) reachable on port 25.
reachable mx.zoho.com, mx2.zoho.com, mx3.zoho.com
unreachable (none)
pass
Greeting is 220 with a hostname (mx.zohomail.com).
banner 220 mx.zohomail.com SMTP Server ready September 6, 2026 8:34:23 AM PDT
warn
Banner hostname does not match reverse DNS.
banner_fqdn mx.zohomail.com
ptr mx3.zoho.com
pass
EHLO accepted with 2 extension(s).
extensions 8BITMIME, SIZE
info
Server does not advertise SMTPUTF8; internationalized (EAI) addresses may be rejected.
info
Server does not advertise REQUIRETLS; senders cannot demand TLS-only delivery to this host.
pass
STARTTLS is advertised in EHLO.
pass
STARTTLS negotiated a working TLS session.
tls_version TLSv1.3
pass
Negotiated TLSv1.3.
tls_version TLSv1.3
host mx.zoho.com
pass
Certificate valid for 145 more day(s).
not_after 2027-01-29T23:59:59+00:00
host mx.zoho.com
pass
Certificate covers mx.zoho.com.
names *.zoho.com, zoho.com
host mx.zoho.com
pass
Server presented a 2-certificate chain.
chain_len 2
host mx.zoho.com
pass
Server refused external relay, as expected.
reply 553 Relaying disallowed
pass
Server accepts the null sender (MAIL FROM:<>), so bounces and DSNs can be delivered.
reply 250 Sender <> OK
About this report
This report grades the email and DNS setup of dsgtransportllc.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.