Authentication Records Check for

medium.com

Instant checks for DMARC, SPF, and BIMI with clear, actionable guidance.

DMARC SPF BIMI

All data displayed is public and provided by the DNS system. Use of this website is subject to our Terms of Service.

Last checked about 9 hours ago

0 out of 100
Good

Domain Health Score

Your domain has basic email authentication in place. Consider strengthening your configuration for better protection.

SPF
Sender Policy Framework
26 / 30
DMARC
Domain-based Message Authentication
50 / 50
BIMI
Brand Indicators for Message Identification
0 / 20

Top Recommendation

+4

Upgrade to -all (hard fail) for maximum protection

SPF improvement

0

DMARC Check Results

50 / 50 points

Score Breakdown

DMARC record published
+10
Syntax valid
+5
Reject policy (maximum protection)
+20
Aggregate reporting (rua) configured and verified
+10
Forensic reporting (ruf) configured
+5

DMARC Check Passed: Properly Configured

DMARC record is valid and configured correctly.

_dmarc.medium.com TXT Entry:

v=DMARC1; p=reject; sp=reject; pct=100;fo=1; ri=3600; rua=mailto:[email protected]; ruf=mailto:[email protected],mailto:[email protected]

Policy (p)

reject

DKIM Alignment (adkim)

Relaxed (default)

SPF Alignment (aspf)

Relaxed (default)

Reporting (RUA/RUF)

Aggregate Reports

Configured
[email protected]
Learn more about aggregate reports →

Forensic Reports

Configured
[email protected]
[email protected]
Learn more about forensic reports →

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0

BIMI Check (default selector)

0 / 20 points

Score Breakdown

BIMI record published (optional)
0 / 5

No BIMI Record Found

Publish a TXT record at default._bimi.medium.com with v=BIMI1, logo URL (l=) and optional verified mark certificate (a=).

Create BIMI Record for medium.com
0

SPF Record Check Results

26 / 30 points

Score Breakdown

SPF record published
+10
Syntax valid
+5
Soft fail policy (~all)
+6 / 10
No configuration warnings
+5

SPF record is valid.

medium.com TXT SPF Entry:

v=spf1 include:amazonses.com include:_spf.google.com include:mail.zendesk.com include:sendgrid.net include:spf.tipalti.com include:_spf.psm.knowbe4.com ~all

Syntax Check

OK

DNS Lookup Count

7 / 10 max

Root-level mechanisms requiring DNS queries: 6.

Void Lookups

0 / 2 max

Default Policy

~all

Soft fail: Mark emails from unauthorized servers as suspicious but don't reject

All Authorized IP Addresses

Grouped by DNS record source (includes and sub-includes)

include:amazonses.com | Amazon SES
199.255.192.0/22
199.127.232.0/22
54.240.0.0/18
69.169.224.0/20
23.249.208.0/20
23.251.224.0/19
76.223.176.0/20
54.240.64.0/18
76.223.128.0/19
216.221.160.0/19
206.55.144.0/20
24.110.64.0/18
include:_spf.google.com | Google
74.125.0.0/16
209.85.128.0/17
2001:4860:4000::/36
2404:6800:4000::/36
2607:f8b0:4000::/36
2800:3f0:4000::/36
2a00:1450:4000::/36
2c0f:fb50:4000::/36
include:mail.zendesk.com
103.151.192.0/23
185.12.80.0/22
188.172.128.0/20
192.161.144.0/20
216.198.0.0/18
include:sendgrid.net | SendGrid
167.89.0.0/17
208.117.48.0/20
50.31.32.0/19
198.37.144.0/20
198.21.0.0/21
192.254.112.0/20
168.245.0.0/17
149.72.0.0/16
159.183.0.0/16
134.128.64.0/19
134.128.96.0/19

This record also contains:

include:ab.sendgrid.net - SendGrid
include:ab.sendgrid.net | SendGrid
223.165.113.0/24
223.165.115.0/24
223.165.118.0/23
223.165.120.0/23
include:spf.tipalti.com
52.73.203.75
44.193.121.189
76.223.136.223
76.223.136.224
include:_spf.psm.knowbe4.com
23.21.109.197
23.21.109.212
147.160.167.14
147.160.167.15
52.49.235.189
52.49.201.246

DNS Lookup Details

1
include:
amazonses.com | Amazon SES
Valid

SPF record found

Lookup cost: 0
Included by medium.com

TXT Record

v=spf1 ip4:199.255.192.0/22 ip4:199.127.232.0/22 ip4:54.240.0.0/18 ip4:69.169.224.0/20 ip4:23.249.208.0/20 ip4:23.251.224.0/19 ip4:76.223.176.0/20 ip4:54.240.64.0/18 ip4:76.223.128.0/19 ip4:216.221.160.0/19 ip4:206.55.144.0/20 ip4:24.110.64.0/18 -all

Processed recursively per RFC 7208

2
include:
_spf.google.com | Google
Valid

SPF record found

Lookup cost: 0
Included by medium.com

TXT Record

v=spf1 ip4:74.125.0.0/16 ip4:209.85.128.0/17 ip6:2001:4860:4000::/36 ip6:2404:6800:4000::/36 ip6:2607:f8b0:4000::/36 ip6:2800:3f0:4000::/36 ip6:2a00:1450:4000::/36 ip6:2c0f:fb50:4000::/36 ~all

Processed recursively per RFC 7208

3
include:
mail.zendesk.com
Valid

SPF record found

Lookup cost: 0
Included by medium.com

TXT Record

v=spf1 ip4:103.151.192.0/23 ip4:185.12.80.0/22 ip4:188.172.128.0/20 ip4:192.161.144.0/20 ip4:216.198.0.0/18 ~all

Processed recursively per RFC 7208

4
include:
sendgrid.net | SendGrid
Valid

SPF record found

Lookup cost: 1
Included by medium.com

TXT Record

v=spf1 ip4:167.89.0.0/17 ip4:208.117.48.0/20 ip4:50.31.32.0/19 ip4:198.37.144.0/20 ip4:198.21.0.0/21 ip4:192.254.112.0/20 ip4:168.245.0.0/17 ip4:149.72.0.0/16 ip4:159.183.0.0/16 ip4:134.128.64.0/19 ip4:134.128.96.0/19 include:ab.sendgrid.net ~all

Processed recursively per RFC 7208

5
include:
ab.sendgrid.net | SendGrid
Valid

SPF record found

Lookup cost: 0
Included by sendgrid.net

TXT Record

v=spf1 ip4:223.165.113.0/24 ip4:223.165.115.0/24 ip4:223.165.118.0/23 ip4:223.165.120.0/23 ~all

Processed recursively per RFC 7208

6
include:
spf.tipalti.com
Valid

SPF record found

Lookup cost: 0
Included by medium.com

TXT Record

v=spf1 ip4:52.73.203.75 ip4:44.193.121.189 ip4:76.223.136.223 ip4:76.223.136.224 -all

Processed recursively per RFC 7208

7
include:
_spf.psm.knowbe4.com
Valid

SPF record found

Lookup cost: 0
Included by medium.com

TXT Record

v=spf1 ip4:23.21.109.197 ip4:23.21.109.212 ip4:147.160.167.14 ip4:147.160.167.15 ip4:52.49.235.189 ip4:52.49.201.246 -all

Processed recursively per RFC 7208

Email Security Configuration

How medium.com configures email authentication

DMARC Domain Policy
Configured
v=DMARC1; p=reject; sp=reject; pct=100;fo=1; ri=3600; rua=mailto:[email protected]; ruf=mailto:[email protected],mailto:[email protected]
p=reject DKIM: relaxed SPF: relaxed Reports enabled
SPF Sender Authorization
Configured
v=spf1 include:amazonses.com include:_spf.google.com include:mail.zendesk.com include:sendgrid.net include:spf.tipalti.com include:_spf.psm.knowbe4.com ~all
~all 6 includes
BIMI Brand Indicator
Not set
No BIMI record configured for this domain

Change History

Monitoring started January 10, 2026

Configuration changes will appear here when detected

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Showing domains checked by our users. All data is from public DNS records.

About This Checker

What we check

We analyze your domain's email authentication: DMARC policy and alignment, SPF record and includes, and BIMI logo/CV when present.

Why it matters

Healthy authentication improves delivery and blocks spoofing. Major inbox providers increasingly require DMARC and robust SPF/DKIM practices for senders.

Included features

  • DMARC syntax, policy, and reporting validation
  • SPF record evaluation and include analysis
  • DKIM/SPF alignment interpretation
  • BIMI record and VMC detection
  • Clear setup and remediation guidance

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