B
one2create.co.uk
Score 89/100 · 0 failing, 4 warnings
Mail provider: onyx.io
Check another domain Re-scan

Scanned 52 minutes ago. Re-scan for a fresh result after a fix.

Issues to fix

Results

01Mail exchangers (MX)A
pass
2 MX record(s) found.
records
preferenceexchangettl
10mx1.onyx.io600
20mx2.onyx.io600
02Mail providerA
info
Mail is handled by onyx.io, a self-hosted or independent provider.
provider onyx.io
03SPFA
pass
SPF record present.
record v=spf1 +mx +a +ip4:185.53.59.182 +ip4:185.53.56.21 +ip4:77.72.3.233/32 +ip4:217.69.47.90/32 +ip4:77.72.5.81/32 include:_spf.google.com include:relay.k.io -all
pass
SPF uses 5 of the 10 permitted DNS lookups.
RFC 7208 §4.6.4
lookups 5
pass
-all default policy.
RFC 7208
04DKIMA
pass
Selector default key is ~2048-bit.
selector default
record v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w…IDAQAB;
bits 2048
pass
Selector k2 key is ~2048-bit.
selector k2
record v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w…IDAQAB;
bits 2048
info
DKIM2 reuses these same selector._domainkey records and advertises no capability, so support cannot be detected from DNS. The 2 published key(s) carry over as they are. Adding an Ed25519 key (RFC 8463) prepares for it.
draft-ietf-dkim-dkim2-spec
keys 2
ed25519 false
05DMARCA
pass
DMARC record present.
record v=DMARC1; p=none; sp=reject; pct=25; ri=86400; rua=mailto:support@one2create.co.uk
warn
p=none: monitoring only, unauthenticated mail is not blocked.
RFC 9989
p none
rua true
warn
pct=25 is deprecated in DMARCbis, apply the policy to all mail.
RFC 9989
06DNS healthA
pass
4 nameservers published.
RFC 2182
count 4
pass
SOA timers are sane.
RFC 1912
mname ns1.kloudns.co.uk.
rname dns-admin.katapult.io.
refresh 28800
retry 7200
expire 604800
minimum 3600
info
Zone is not DNSSEC-signed.
RFC 9364
07BlacklistsA
pass
185.53.56.47 is not listed on SpamCop.
target 185.53.56.47
list SpamCop
pass
185.53.56.44 is not listed on SpamCop.
target 185.53.56.44
list SpamCop
pass
185.53.56.45 is not listed on SpamCop.
target 185.53.56.45
list SpamCop
pass
185.53.56.46 is not listed on SpamCop.
target 185.53.56.46
list SpamCop
pass
185.53.56.44 is not listed on GBUdb Truncate.
target 185.53.56.44
list GBUdb Truncate
pass
185.53.56.44 is not listed on PSBL.
target 185.53.56.44
list PSBL
pass
185.53.56.46 is not listed on PSBL.
target 185.53.56.46
list PSBL
pass
185.53.56.45 is not listed on PSBL.
target 185.53.56.45
list PSBL
pass
185.53.56.47 is not listed on PSBL.
target 185.53.56.47
list PSBL
pass
185.53.56.45 is not listed on Spamhaus ZEN.
target 185.53.56.45
list Spamhaus ZEN
pass
185.53.56.44 is not listed on Spamhaus ZEN.
target 185.53.56.44
list Spamhaus ZEN
pass
185.53.56.46 is not listed on Spamhaus ZEN.
target 185.53.56.46
list Spamhaus ZEN
pass
185.53.56.46 is not listed on GBUdb Truncate.
target 185.53.56.46
list GBUdb Truncate
pass
185.53.56.47 is not listed on GBUdb Truncate.
target 185.53.56.47
list GBUdb Truncate
pass
one2create.co.uk is not listed on Spamhaus ZRD.
target one2create.co.uk
list Spamhaus ZRD
pass
one2create.co.uk is not listed on Spamhaus DBL.
target one2create.co.uk
list Spamhaus DBL
pass
185.53.56.47 is not listed on Spamhaus ZEN.
target 185.53.56.47
list Spamhaus ZEN
pass
185.53.56.46 is not listed on Spamhaus AuthBL.
target 185.53.56.46
list Spamhaus AuthBL
pass
185.53.56.45 is not listed on Spamhaus AuthBL.
target 185.53.56.45
list Spamhaus AuthBL
pass
185.53.56.44 is not listed on Spamhaus AuthBL.
target 185.53.56.44
list Spamhaus AuthBL
pass
185.53.56.47 is not listed on Spamhaus AuthBL.
target 185.53.56.47
list Spamhaus AuthBL
pass
185.53.56.45 is not listed on GBUdb Truncate.
target 185.53.56.45
list GBUdb Truncate
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.
RFC 7672
hosts mx1.onyx.io, mx2.onyx.io
pass
Negotiated TLSv1.3.
RFC 8996
tls_version TLSv1.3
host mx1.onyx.io
pass
Certificate valid for 106 more day(s).
not_after 2026-12-19T23:59:59+00:00
host mx1.onyx.io
pass
Certificate covers mx1.onyx.io.
RFC 6125
names mx1.krystal.uk, mx1.cloudhosting.co.uk, mx1.cloudhosting.net, mx1.cloudhosting.uk, mx1.krystal.co.uk, mx1.krystal.io, mx1.krystalhosting.com, mx1.onyx.io, mx1.uksrv.co.uk, mx1.uksrv.uk, mx2.cloudhosting.co.uk, mx2.cloudhosting.net, mx2.cloudhosting.uk, mx2.krystal.co.uk, mx2.krystal.io, mx2.krystal.uk, mx2.krystalhosting.com, mx2.onyx.io, mx2.uksrv.co.uk, mx2.uksrv.uk
host mx1.onyx.io
pass
Server presented a 4-certificate chain.
chain_len 4
host mx1.onyx.io
10MTA-STSA
info
No MTA-STS policy. Inbound mail is delivered without enforced TLS.
RFC 8461
warn
No TLS-RPT reporting address. TLS delivery failures go unreported.
RFC 8460
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.
RFC 7672
hosts mx1.onyx.io, mx2.onyx.io
pass
2 of 2 MX host(s) reachable on port 25.
RFC 5321
reachable mx1.onyx.io, mx2.onyx.io
unreachable (none)
pass
Greeting is 220 with a hostname (mx.strikemail.co.uk).
RFC 5321
banner 220 mx.strikemail.co.uk ESMTP Service Ready
warn
Banner hostname does not match reverse DNS.
banner_fqdn mx.strikemail.co.uk
ptr mx1.strikemail.co.uk
pass
EHLO accepted with 6 extension(s).
RFC 5321
extensions 8BITMIME, CHUNKING, DSN, HELP, SIZE, VRFY
info
Server does not advertise SMTPUTF8; internationalized (EAI) addresses may be rejected.
RFC 6531
info
Server does not advertise REQUIRETLS; senders cannot demand TLS-only delivery to this host.
RFC 8689
pass
STARTTLS is advertised in EHLO.
RFC 3207
pass
STARTTLS negotiated a working TLS session.
RFC 3207
tls_version TLSv1.3
pass
Negotiated TLSv1.3.
RFC 8996
tls_version TLSv1.3
host mx1.onyx.io
pass
Certificate valid for 106 more day(s).
not_after 2026-12-19T23:59:59+00:00
host mx1.onyx.io
pass
Certificate covers mx1.onyx.io.
RFC 6125
names mx1.krystal.uk, mx1.cloudhosting.co.uk, mx1.cloudhosting.net, mx1.cloudhosting.uk, mx1.krystal.co.uk, mx1.krystal.io, mx1.krystalhosting.com, mx1.onyx.io, mx1.uksrv.co.uk, mx1.uksrv.uk, mx2.cloudhosting.co.uk, mx2.cloudhosting.net, mx2.cloudhosting.uk, mx2.krystal.co.uk, mx2.krystal.io, mx2.krystal.uk, mx2.krystalhosting.com, mx2.onyx.io, mx2.uksrv.co.uk, mx2.uksrv.uk
host mx1.onyx.io
pass
Server presented a 4-certificate chain.
chain_len 4
host mx1.onyx.io
pass
Server refused external relay, as expected.
RFC 5321
reply 451 relay not permitted!
pass
Server accepts the null sender (MAIL FROM:<>), so bounces and DSNs can be delivered.
RFC 5321
reply 250 OK

About this report

This report grades the email and DNS setup of one2create.co.uk 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.

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