Authentication Records Check for

tumblr.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
Very Good

Domain Health Score

Your domain has strong email authentication. A few improvements can get you to a perfect score.

SPF
Sender Policy Framework
30 / 30
DMARC
Domain-based Message Authentication
42 / 50
BIMI
Brand Indicators for Message Identification
15 / 20

Top Recommendation

+8

Upgrade DMARC policy to reject for stronger protection

DMARC improvement

0

DMARC Check Results

42 / 50 points

Score Breakdown

DMARC record published
+10
Syntax valid
+5
Quarantine policy
+12 / 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.tumblr.com TXT Entry:

v=DMARC1; p=quarantine; pct=100; rua=mailto:[email protected]; ruf=mailto:[email protected];

Policy (p)

quarantine

DKIM Alignment (adkim)

Relaxed (default)

SPF Alignment (aspf)

Relaxed (default)

Reporting (RUA/RUF)

Aggregate Reports

Configured
[email protected]
External Domain Verification
[email protected]

Verification successful

Learn more about aggregate reports →

Forensic Reports

Configured
[email protected]
External Domain Verification
[email protected]

Verification successful

Learn more about forensic reports →

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  • Automated DMARC report processing every 5 minutes
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  • Track all sending sources and authentication results
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0

BIMI Check (default selector)

15 / 20 points

Score Breakdown

BIMI record published
+5
BIMI record valid
+5
Logo URL accessible and valid SVG
+5
No VMC certificate configured (optional)
0 / 5

BIMI Record Found and Looks Good

Current BIMI Entry:

v=BIMI1; l=https://assets.tumblr.com/images/favicons/favicon-bimi.svg; a=;

Logo URL

https://assets.tumblr.com/images/favicons/favicon-bimi.svg

image/svg+xml

Note: We do not parse SVG content for safety.

Mark Certificate

No certificate URL provided (a=). Optional when using self-asserted logos.

0

SPF Record Check Results

30 / 30 points

Score Breakdown

SPF record published
+10
Syntax valid
+5
Hard fail policy (-all)
+10
No configuration warnings
+5

SPF record is valid.

tumblr.com TXT SPF Entry:

v=spf1 include:_spf.google.com include:_spf.automattic.com include:sendgrid.net include:mail.zendesk.com include:21055259.spf05.hubspotemail.net -all

Syntax Check

OK

DNS Lookup Count

6 / 10 max

Root-level mechanisms requiring DNS queries: 5.

Void Lookups

0 / 2 max

Default Policy

-all

Fail: Reject emails from unauthorized servers (recommended for production)

All Authorized IP Addresses

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

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:_spf.automattic.com
192.0.64.0/18
195.234.109.226/32
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: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:21055259.spf05.hubspotemail.net | HubSpot
3.93.157.0/24
3.210.190.0/24
18.208.124.128/25
54.174.52.0/24
54.174.57.0/24
54.174.59.0/24
54.174.60.0/23
54.174.63.0/24
108.179.144.0/20
139.180.17.0/24
141.193.184.32/27
141.193.184.64/26
141.193.184.128/25
141.193.185.32/27
141.193.185.64/26
141.193.185.128/25
143.244.80.0/20
158.247.16.0/20
216.139.64.0/19

DNS Lookup Details

1
include:
_spf.google.com | Google
Valid

SPF record found

Lookup cost: 0
Included by tumblr.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

2
include:
_spf.automattic.com
Valid

SPF record found

Lookup cost: 0
Included by tumblr.com

TXT Record

v=spf1 ip4:192.0.64.0/18 ip4:195.234.109.226/32 ~all

Processed recursively per RFC 7208

3
include:
sendgrid.net | SendGrid
Valid

SPF record found

Lookup cost: 1
Included by tumblr.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

4
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

5
include:
mail.zendesk.com
Valid

SPF record found

Lookup cost: 0
Included by tumblr.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

6
include:
21055259.spf05.hubspotemail.net | HubSpot
Valid

SPF record found

Lookup cost: 0
Included by tumblr.com

TXT Record

v=spf1 ip4:3.93.157.0/24 ip4:3.210.190.0/24 ip4:18.208.124.128/25 ip4:54.174.52.0/24 ip4:54.174.57.0/24 ip4:54.174.59.0/24 ip4:54.174.60.0/23 ip4:54.174.63.0/24 ip4:108.179.144.0/20 ip4:139.180.17.0/24 ip4:141.193.184.32/27 ip4:141.193.184.64/26 ip4:141.193.184.128/25 ip4:141.193.185.32/27 ip4:141.193.185.64/26 ip4:141.193.185.128/25 ip4:143.244.80.0/20 ip4:158.247.16.0/20 ip4:216.139.64.0/19 -all

Processed recursively per RFC 7208

Email Security Configuration

How tumblr.com configures email authentication

DMARC Domain Policy
Configured
v=DMARC1; p=quarantine; pct=100; rua=mailto:[email protected]; ruf=mailto:[email protected];
p=quarantine DKIM: relaxed SPF: relaxed Reports enabled
SPF Sender Authorization
Configured
v=spf1 include:_spf.google.com include:_spf.automattic.com include:sendgrid.net include:mail.zendesk.com include:21055259.spf05.hubspotemail.net -all
-all 5 includes
BIMI Brand Indicator
Configured
v=BIMI1; l=https://assets.tumblr.com/images/favicons/favicon-bimi.svg; a=;
Logo configured

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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