MX Tool Check — Mail Security Check

Domain: gmail.com · Score: 6.2 / 10 · Risk: Medium · Generated: 2026-06-05 21:43 UTC

Mail Security & Deliverability Checker

Free online tools to test SPF, DKIM, DMARC, MX records, DNS blacklists, reverse DNS and SMTP/STARTTLS. Run a one-click Mail Security Check, get a 0–10 score with per-record findings and download a shareable PDF report.

Mail Security Anti-Spoof Inbound Health MX SPF DMARC DKIM DNS PTR Blacklist SMTP Relay WHOIS Headers
6.2
of 10

Mail Security Check · gmail.com

Risk: Medium Some protections are in place, but spoofers can still slip through.
Download PDF Re-run JSON

SPF

WARN
Sender Policy Framework
1 / 250%

DMARC

WARN
Policy & reporting
2.2 / 373%

DKIM

FAIL
Cryptographic signing
0 / 20%

MX

PASS
Mail Exchanger records
2 / 2100%

Blacklist

PASS
DNSBL reputation of MX IPs
1 / 1100%
SPF Sender Policy Framework
WARN · 1/2 
v=spf1 redirect=_spf.google.com
  • SPF record is present.
  • No "all" mechanism — SPF is incomplete.
Fix:End your SPF with "-all" and keep DNS lookups ≤ 10.
DMARC Policy & reporting
WARN · 2.2/3 
v=DMARC1; p=none; sp=quarantine; rua=mailto:[email protected]
vDMARC1
pnone
spquarantine
ruamailto:[email protected]
  • DMARC record is present.
  • Policy p=none — monitoring only, no enforcement.
  • Aggregate reporting (rua) configured.
  • Explicit subdomain policy sp=quarantine.
Fix:Move from p=none to p=quarantine (and later p=reject) once aligned.
DKIM Cryptographic signing
FAIL · 0/2
  • No DKIM record found from common selectors. Outgoing mail cannot be cryptographically signed.
  • Note: DKIM uses custom selectors — your provider may use a non-standard name.
Fix:Ask your mail provider for the DKIM selector and public key, then publish it as TXT <selector>._domainkey.gmail.com
MX Mail Exchanger records
PASS · 2/2 
5     gmail-smtp-in.l.google.com
10    alt1.gmail-smtp-in.l.google.com
20    alt2.gmail-smtp-in.l.google.com
30    alt3.gmail-smtp-in.l.google.com
40    alt4.gmail-smtp-in.l.google.com
  • Found 5 MX record(s).
  • Multiple MX records — good redundancy.
  • Resolved IPs: 74.125.71.27, 192.178.213.26, 142.251.127.27.
Blacklist DNSBL reputation of MX IPs
PASS · 1/1
74.125.71.27 (gmail-smtp-in.l.google.com) ALL CLEAN
Spamhaus ZENzen.spamhaus.org
PASS
SpamCopbl.spamcop.net
PASS
Barracudab.barracudacentral.org
PASS
SORBSdnsbl.sorbs.net
PASS
SORBS Spamspam.dnsbl.sorbs.net
PASS
CBL Abuseatcbl.abuseat.org
PASS
PSBLpsbl.surriel.com
PASS
Mailspikebl.mailspike.net
PASS
UCEPROTECT L1dnsbl-1.uceprotect.net
PASS
GBUdbtruncate.gbudb.net
PASS
s5hall.s5h.net
PASS
InterServerrbl.interserver.net
PASS
SpamRATSspam.spamrats.com
PASS
Manituix.dnsbl.manitu.net
PASS
192.178.213.26 (alt1.gmail-smtp-in.l.google.com) ALL CLEAN
Spamhaus ZENzen.spamhaus.org
PASS
SpamCopbl.spamcop.net
PASS
Barracudab.barracudacentral.org
PASS
SORBSdnsbl.sorbs.net
PASS
SORBS Spamspam.dnsbl.sorbs.net
PASS
CBL Abuseatcbl.abuseat.org
PASS
PSBLpsbl.surriel.com
PASS
Mailspikebl.mailspike.net
PASS
UCEPROTECT L1dnsbl-1.uceprotect.net
PASS
GBUdbtruncate.gbudb.net
PASS
s5hall.s5h.net
PASS
InterServerrbl.interserver.net
PASS
SpamRATSspam.spamrats.com
PASS
Manituix.dnsbl.manitu.net
PASS
142.251.127.27 (alt2.gmail-smtp-in.l.google.com) ALL CLEAN
Spamhaus ZENzen.spamhaus.org
PASS
SpamCopbl.spamcop.net
PASS
Barracudab.barracudacentral.org
PASS
SORBSdnsbl.sorbs.net
PASS
SORBS Spamspam.dnsbl.sorbs.net
PASS
CBL Abuseatcbl.abuseat.org
PASS
PSBLpsbl.surriel.com
PASS
Mailspikebl.mailspike.net
PASS
UCEPROTECT L1dnsbl-1.uceprotect.net
PASS
GBUdbtruncate.gbudb.net
PASS
s5hall.s5h.net
PASS
InterServerrbl.interserver.net
PASS
SpamRATSspam.spamrats.com
PASS
Manituix.dnsbl.manitu.net
PASS
  • All 3 MX IP(s) are clean across 14 DNSBLs.