mindbridge.net: 88/100 (B)

mindbridge.net

Score 88/100 · 0 failing, 6 warnings

Mail provider: Google Workspace

Check another domain Re-scan

Scanned 51 minutes ago. Re-scan for a fresh result after a fix.

Issues to fix

warnSome MX hosts do not resolve to any address.→
warnp=none: monitoring only, unauthenticated mail is not blocked.→
warnFCrDNS mismatch: 173.194.41.26 -> mad01s14-in-f26.1e100.net does not resolve back to the same IP.→
warnDeep include chain (nested includes are hard to audit and can push you toward the 10-lookup limit).→
warnNo TLS-RPT reporting address. TLS delivery failures go unreported.→
warnBanner hostname does not match reverse DNS.→

Results

01Mail exchangers (MX)A

pass

6 MX record(s) found.

records

preference	exchange	ttl
1	aspmx.l.google.com	3600
5	alt1.aspmx.l.google.com	3600
5	alt2.aspmx.l.google.com	3600
10	alt3.aspmx.l.google.com	3600
10	alt4.aspmx.l.google.com	3600
15	oib7qtn2oey5tiez7p2tn77qbpcgwutyo3af4flq7mrkwtsimtrq.mx-verification.google.com	3600

info

Multiple MX hosts share a preference, delivery load-balances across them.

warn

Some MX hosts do not resolve to any address.

hosts oib7qtn2oey5tiez7p2tn77qbpcgwutyo3af4flq7mrkwtsimtrq.mx-verification.google.com

02Mail providerA

info

Mail provider: Google Workspace.

provider google

03SPFA

pass

SPF record present.

record v=spf1 include:_spf.google.com include:secureserver.net ~all

pass

SPF uses 4 of the 10 permitted DNS lookups.

RFC 7208 §4.6.4

lookups 4

warn

Deep include chain (nested includes are hard to audit and can push you toward the 10-lookup limit).

RFC 7208

depth 3

pass

~all default policy.

RFC 7208

04DKIMA

pass

Selector google key is ~2048-bit.

selector google

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 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;

warn

p=none: monitoring only, unauthenticated mail is not blocked.

RFC 9989

p none

rua false

06DNS healthA

warn

FCrDNS mismatch: 173.194.41.26 -> mad01s14-in-f26.1e100.net does not resolve back to the same IP.

host alt1.aspmx.l.google.com

ip 173.194.41.26

ptr mad01s14-in-f26.1e100.net

forward (none)

pass

2 nameservers published.

RFC 2182

count 2

pass

SOA timers are sane.

RFC 1912

mname ns69.domaincontrol.com.

rname dns.jomax.net.

refresh 28800

retry 7200

expire 604800

minimum 600

info

Zone is not DNSSEC-signed.

RFC 9364

07BlacklistsA

info

IPv6 MX addresses are not checked against IP DNSBLs.

pass

172.253.158.27 is not listed on SpamCop.

target 172.253.158.27

list SpamCop

pass

108.177.125.27 is not listed on SpamCop.

target 108.177.125.27

list SpamCop

pass

192.178.211.27 is not listed on GBUdb Truncate.

target 192.178.211.27

list GBUdb Truncate

pass

192.178.230.27 is not listed on SpamCop.

target 192.178.230.27

list SpamCop

pass

173.194.41.26 is not listed on SpamCop.

target 173.194.41.26

list SpamCop

pass

192.178.211.27 is not listed on SpamCop.

target 192.178.211.27

list SpamCop

pass

172.253.158.27 is not listed on GBUdb Truncate.

target 172.253.158.27

list GBUdb Truncate

pass

173.194.41.26 is not listed on GBUdb Truncate.

target 173.194.41.26

list GBUdb Truncate

pass

192.178.211.27 is not listed on PSBL.

target 192.178.211.27

list PSBL

pass

173.194.41.26 is not listed on PSBL.

target 173.194.41.26

list PSBL

pass

172.253.158.27 is not listed on PSBL.

target 172.253.158.27

list PSBL

pass

108.177.125.27 is not listed on PSBL.

target 108.177.125.27

list PSBL

pass

108.177.125.27 is not listed on GBUdb Truncate.

target 108.177.125.27

list GBUdb Truncate

pass

192.178.211.27 is not listed on Spamhaus ZEN.

target 192.178.211.27

list Spamhaus ZEN

pass

173.194.41.26 is not listed on Spamhaus ZEN.

target 173.194.41.26

list Spamhaus ZEN

pass

172.253.158.27 is not listed on Spamhaus ZEN.

target 172.253.158.27

list Spamhaus ZEN

pass

192.178.230.27 is not listed on GBUdb Truncate.

target 192.178.230.27

list GBUdb Truncate

pass

108.177.125.27 is not listed on Spamhaus ZEN.

target 108.177.125.27

list Spamhaus ZEN

pass

mindbridge.net is not listed on Spamhaus ZRD.

target mindbridge.net

list Spamhaus ZRD

pass

mindbridge.net is not listed on Spamhaus DBL.

target mindbridge.net

list Spamhaus DBL

pass

192.178.230.27 is not listed on Spamhaus ZEN.

target 192.178.230.27

list Spamhaus ZEN

pass

192.178.211.27 is not listed on Spamhaus AuthBL.

target 192.178.211.27

list Spamhaus AuthBL

pass

173.194.41.26 is not listed on Spamhaus AuthBL.

target 173.194.41.26

list Spamhaus AuthBL

pass

172.253.158.27 is not listed on Spamhaus AuthBL.

target 172.253.158.27

list Spamhaus AuthBL

pass

192.178.230.27 is not listed on Spamhaus AuthBL.

target 192.178.230.27

list Spamhaus AuthBL

pass

108.177.125.27 is not listed on Spamhaus AuthBL.

target 108.177.125.27

list Spamhaus AuthBL

pass

192.178.230.27 is not listed on PSBL.

target 192.178.230.27

list PSBL

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 aspmx.l.google.com, alt1.aspmx.l.google.com, alt2.aspmx.l.google.com, alt3.aspmx.l.google.com, alt4.aspmx.l.google.com, oib7qtn2oey5tiez7p2tn77qbpcgwutyo3af4flq7mrkwtsimtrq.mx-verification.google.com

pass

Negotiated TLSv1.3.

RFC 8996

tls_version TLSv1.3

host aspmx.l.google.com

pass

Certificate valid for 47 more day(s).

not_after 2026-11-02T08:39:01+00:00

host aspmx.l.google.com

pass

Certificate covers aspmx.l.google.com.

RFC 6125

names mx.google.com, smtp.google.com, aspmx.l.google.com, alt1.aspmx.l.google.com, alt2.aspmx.l.google.com, alt3.aspmx.l.google.com, alt4.aspmx.l.google.com, gmail-smtp-in.l.google.com, alt1.gmail-smtp-in.l.google.com, alt2.gmail-smtp-in.l.google.com, alt3.gmail-smtp-in.l.google.com, alt4.gmail-smtp-in.l.google.com, gmr-smtp-in.l.google.com, alt1.gmr-smtp-in.l.google.com, alt2.gmr-smtp-in.l.google.com, alt3.gmr-smtp-in.l.google.com, alt4.gmr-smtp-in.l.google.com, mx1.smtp.goog, mx2.smtp.goog, mx3.smtp.goog, mx4.smtp.goog, aspmx2.googlemail.com, aspmx3.googlemail.com, aspmx4.googlemail.com, aspmx5.googlemail.com, gmr-mx.google.com

host aspmx.l.google.com

pass

Server presented a 3-certificate chain.

chain_len 3

host aspmx.l.google.com

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

pass

5 of 5 MX host(s) reachable on port 25.

RFC 5321

reachable aspmx.l.google.com, alt1.aspmx.l.google.com, alt2.aspmx.l.google.com, alt3.aspmx.l.google.com, alt4.aspmx.l.google.com

unreachable (none)

pass

Greeting is 220 with a hostname (mx.google.com).

RFC 5321

banner 220 mx.google.com ESMTP 5a478bee46e88-33bf5a6d2e6si3800224eec.20 - gsmtp

warn

Banner hostname does not match reverse DNS.

banner_fqdn mx.google.com

ptr lcbomp-in-f27.1e100.net

pass

EHLO accepted with 6 extension(s).

RFC 5321

extensions 8BITMIME, CHUNKING, ENHANCEDSTATUSCODES, PIPELINING, SIZE, SMTPUTF8

pass

Server advertises SMTPUTF8, so it accepts internationalized (EAI) email addresses.

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 aspmx.l.google.com

pass

Certificate valid for 47 more day(s).

not_after 2026-11-02T08:39:01+00:00

host aspmx.l.google.com

pass

Certificate covers aspmx.l.google.com.

RFC 6125

host aspmx.l.google.com

pass

Server presented a 3-certificate chain.

chain_len 3

host aspmx.l.google.com

pass

Server refused external relay, as expected.

RFC 5321

reply 550-5.1.1 The email account that you tried to reach does not exist. Please try

pass

Server accepts the null sender (MAIL FROM:<>), so bounces and DSNs can be delivered.

RFC 5321

reply 250 2.1.0 OK 5a478bee46e88-33bf5a6d2e6si3800224eec.20 - gsmtp

About this report

This report grades the email and DNS setup of mindbridge.net 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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