Authentication Records Check for

mit.edu

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 6 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
30 / 30
DMARC
Domain-based Message Authentication
29 / 50
BIMI
Brand Indicators for Message Identification
0 / 20

Top Recommendation

+16

Upgrade DMARC policy to quarantine or reject for stronger protection

DMARC improvement

0

DMARC Check Results

29 / 50 points

Score Breakdown

DMARC record published
+10
Syntax valid
+5
None policy (monitoring only)
+4 / 20
Aggregate reporting (rua) configured and verified
+10
Forensic reporting (ruf) not configured (optional)
0 / 5

DMARC Check Passed: Properly Configured

DMARC record is valid and configured correctly.

_dmarc.mit.edu TXT Entry:

v=DMARC1; p=none; rua=mailto:[email protected]

Policy (p)

none

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

Not Configured
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.mit.edu with v=BIMI1, logo URL (l=) and optional verified mark certificate (a=).

Create BIMI Record for mit.edu
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.

mit.edu TXT SPF Entry:

v=spf1 include:_s00430413.autospf.email -all

Syntax Check

OK

DNS Lookup Count

9 / 10 max

Close to RFC limit!

Root-level mechanisms requiring DNS queries: 1.

Void Lookups

1 / 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:_s00430413.autospf.email
3.99.6.92
69.72.41.2
52.42.20.3
52.101.9.2
62.23.85.10
18.9.1.0/24
54.88.39.81
69.72.41.28
207.54.75.14
207.54.75.15
207.54.75.16
142.0.177.24
142.0.187.58
18.7.16.0/24
18.7.21.0/24
18.7.34.0/24
18.7.62.0/24
18.7.68.0/24
18.7.71.0/24
18.9.21.0/24
18.9.25.0/24
18.9.28.0/24
74.112.64.38
129.41.172.4

This record also contains:

include:_s004304130.autospf.email
include:_s004304130.autospf.email
64.128.67.16
64.128.67.20
72.55.140.81
69.72.32.253
69.72.47.188
69.72.34.120
69.72.45.120
12.228.6.215
52.45.50.190
52.31.29.196
52.60.142.64
13.237.94.13
54.66.240.63
40.92.0.0/15
52.5.134.202
52.101.41.21
52.101.42.18
52.101.11.10
207.54.83.136
207.54.83.137
207.54.83.138
69.20.119.219
63.32.240.193

This record also contains:

include:_s004304131.autospf.email
include:_s004304131.autospf.email
52.19.113.120
74.125.0.0/16
139.60.0.0/22
74.112.65.118
208.85.54.226
129.41.172.69
165.192.56.56
13.111.0.0/16
143.55.237.88
167.89.0.0/17
50.31.32.0/19
198.21.0.0/21
149.72.0.0/16
52.76.190.252
3.218.253.173
35.160.78.215
54.195.228.99
40.172.14.241
40.107.0.0/16
52.100.0.0/15
52.102.0.0/16
52.103.0.0/17

This record also contains:

include:_s004304132.autospf.email
include:_s004304132.autospf.email
104.47.0.0/17
154.62.6.0/24
34.251.228.195
142.0.176.0/20
69.48.230.0/25
20.96.12.43/32
20.1.130.13/32
37.59.249.0/24
69.25.199.0/24
87.253.236.214
148.105.0.0/16
178.33.111.144
159.183.195.16
143.55.237.127
143.55.237.162
143.55.237.120
185.12.80.0/22
216.198.0.0/18
168.245.0.0/17
159.183.0.0/16
13.215.187.237

This record also contains:

include:_s004304133.autospf.email
include:_s004304133.autospf.email
40.172.175.158
20.1.128.197/32
20.10.24.226/32
209.85.128.0/17
37.59.69.128/25
75.98.95.161/27
87.253.232.0/21
96.43.144.64/31
96.43.148.64/31
165.193.101.141
165.193.101.142
198.187.196.100
198.187.196.130
198.245.81.0/24
159.135.226.248
159.135.233.165
12.228.6.215/32
208.117.48.0/20
198.37.144.0/20
134.128.64.0/19

This record also contains:

include:_s004304134.autospf.email
include:_s004304134.autospf.email
134.128.96.0/19
69.20.119.216/29
76.12.109.192/27
67.59.141.128/28
70.42.227.151/32
70.42.227.152/32
20.114.186.35/32
139.146.160.0/25
74.62.122.128/25
136.147.176.0/24
136.147.182.0/24
136.147.135.0/24
199.122.123.0/24
103.151.192.0/23
188.172.128.0/20
192.161.144.0/20
192.254.112.0/20
223.165.113.0/24
223.165.115.0/24

This record also contains:

include:_s004304135.autospf.email
include:_s004304135.autospf.email
223.165.118.0/23
223.165.120.0/23
209.41.176.224/28
20.119.174.191/32
20.230.106.230/32
20.119.207.133/32
178.33.137.208/28
204.232.162.112/28
204.232.180.112/29
204.232.180.128/29
139.146.146.128/25
2800:3f0:4000::/36
2a01:111:f400::/48
2a01:111:f403::/49
2001:4860:4000::/36
2404:6800:4000::/36
2607:f8b0:4000::/36

This record also contains:

include:_s004304136.autospf.email
include:_s004304136.autospf.email
2a00:1450:4000::/36
2c0f:fb50:4000::/36
2a01:111:f403:f90b::
2a01:111:f403:f901::1
2a01:111:f403:f908::2
2a01:111:f403:c946::2
2a01:111:f403:8000::/51
2a01:111:f403:c000::/51
2a01:111:f403:f000::/52

DNS Lookup Details

1
include:
_s00430413.autospf.email
Valid

SPF record found

Lookup cost: 1
Included by mit.edu

TXT Record

v=spf1 ip4:3.99.6.92 ip4:69.72.41.2 ip4:52.42.20.3 ip4:52.101.9.2 ip4:62.23.85.10 ip4:18.9.1.0/24 ip4:54.88.39.81 ip4:69.72.41.28 ip4:207.54.75.14 ip4:207.54.75.15 ip4:207.54.75.16 ip4:142.0.177.24 ip4:142.0.187.58 ip4:18.7.16.0/24 ip4:18.7.21.0/24 ip4:18.7.34.0/24 ip4:18.7.62.0/24 ip4:18.7.68.0/24 ip4:18.7.71.0/24 ip4:18.9.21.0/24 ip4:18.9.25.0/24 ip4:18.9.28.0/24 ip4:74.112.64.38 ip4:129.41.172.4 include:_s004304130.autospf.email -all

Processed recursively per RFC 7208

2
include:
_s004304130.autospf.email
Valid

SPF record found

Lookup cost: 1
Included by _s00430413.autospf.email

TXT Record

v=spf1 ip4:64.128.67.16 ip4:64.128.67.20 ip4:72.55.140.81 ip4:69.72.32.253 ip4:69.72.47.188 ip4:69.72.34.120 ip4:69.72.45.120 ip4:12.228.6.215 ip4:52.45.50.190 ip4:52.31.29.196 ip4:52.60.142.64 ip4:13.237.94.13 ip4:54.66.240.63 ip4:40.92.0.0/15 ip4:52.5.134.202 ip4:52.101.41.21 ip4:52.101.42.18 ip4:52.101.11.10 ip4:207.54.83.136 ip4:207.54.83.137 ip4:207.54.83.138 ip4:69.20.119.219 ip4:63.32.240.193 include:_s004304131.autospf.email -all

Processed recursively per RFC 7208

3
include:
_s004304131.autospf.email
Valid

SPF record found

Lookup cost: 1
Included by _s004304130.autospf.email

TXT Record

v=spf1 ip4:52.19.113.120 ip4:74.125.0.0/16 ip4:139.60.0.0/22 ip4:74.112.65.118 ip4:208.85.54.226 ip4:129.41.172.69 ip4:165.192.56.56 ip4:13.111.0.0/16 ip4:143.55.237.88 ip4:167.89.0.0/17 ip4:50.31.32.0/19 ip4:198.21.0.0/21 ip4:149.72.0.0/16 ip4:52.76.190.252 ip4:3.218.253.173 ip4:35.160.78.215 ip4:54.195.228.99 ip4:40.172.14.241 ip4:40.107.0.0/16 ip4:52.100.0.0/15 ip4:52.102.0.0/16 ip4:52.103.0.0/17 include:_s004304132.autospf.email -all

Processed recursively per RFC 7208

4
include:
_s004304132.autospf.email
Valid

SPF record found

Lookup cost: 1
Included by _s004304131.autospf.email

TXT Record

v=spf1 ip4:104.47.0.0/17 ip4:154.62.6.0/24 ip4:34.251.228.195 ip4:142.0.176.0/20 ip4:69.48.230.0/25 ip4:20.96.12.43/32 ip4:20.1.130.13/32 ip4:37.59.249.0/24 ip4:69.25.199.0/24 ip4:87.253.236.214 ip4:148.105.0.0/16 ip4:178.33.111.144 ip4:159.183.195.16 ip4:143.55.237.127 ip4:143.55.237.162 ip4:143.55.237.120 ip4:185.12.80.0/22 ip4:216.198.0.0/18 ip4:168.245.0.0/17 ip4:159.183.0.0/16 ip4:13.215.187.237 include:_s004304133.autospf.email -all

Processed recursively per RFC 7208

5
include:
_s004304133.autospf.email
Valid

SPF record found

Lookup cost: 1
Included by _s004304132.autospf.email

TXT Record

v=spf1 ip4:40.172.175.158 ip4:20.1.128.197/32 ip4:20.10.24.226/32 ip4:209.85.128.0/17 ip4:37.59.69.128/25 ip4:75.98.95.161/27 ip4:87.253.232.0/21 ip4:96.43.144.64/31 ip4:96.43.148.64/31 ip4:165.193.101.141 ip4:165.193.101.142 ip4:198.187.196.100 ip4:198.187.196.130 ip4:198.245.81.0/24 ip4:159.135.226.248 ip4:159.135.233.165 ip4:12.228.6.215/32 ip4:208.117.48.0/20 ip4:198.37.144.0/20 ip4:134.128.64.0/19 include:_s004304134.autospf.email -all

Processed recursively per RFC 7208

6
include:
_s004304134.autospf.email
Valid

SPF record found

Lookup cost: 1
Included by _s004304133.autospf.email

TXT Record

v=spf1 ip4:134.128.96.0/19 ip4:69.20.119.216/29 ip4:76.12.109.192/27 ip4:67.59.141.128/28 ip4:70.42.227.151/32 ip4:70.42.227.152/32 ip4:20.114.186.35/32 ip4:139.146.160.0/25 ip4:74.62.122.128/25 ip4:136.147.176.0/24 ip4:136.147.182.0/24 ip4:136.147.135.0/24 ip4:199.122.123.0/24 ip4:103.151.192.0/23 ip4:188.172.128.0/20 ip4:192.161.144.0/20 ip4:192.254.112.0/20 ip4:223.165.113.0/24 ip4:223.165.115.0/24 include:_s004304135.autospf.email -all

Processed recursively per RFC 7208

7
include:
_s004304135.autospf.email
Valid

SPF record found

Lookup cost: 1
Included by _s004304134.autospf.email

TXT Record

v=spf1 ip4:223.165.118.0/23 ip4:223.165.120.0/23 ip4:209.41.176.224/28 ip4:20.119.174.191/32 ip4:20.230.106.230/32 ip4:20.119.207.133/32 ip4:178.33.137.208/28 ip4:204.232.162.112/28 ip4:204.232.180.112/29 ip4:204.232.180.128/29 ip6:2800:3f0:4000::/36 ip4:139.146.146.128/25 ip6:2a01:111:f400::/48 ip6:2a01:111:f403::/49 ip6:2001:4860:4000::/36 ip6:2404:6800:4000::/36 ip6:2607:f8b0:4000::/36 include:_s004304136.autospf.email -all

Processed recursively per RFC 7208

8
include:
_s004304136.autospf.email
Valid

SPF record found

Lookup cost: 1
Included by _s004304135.autospf.email

TXT Record

v=spf1 ip6:2a00:1450:4000::/36 ip6:2c0f:fb50:4000::/36 ip6:2a01:111:f403:f90b:: ip6:2a01:111:f403:f901::1 ip6:2a01:111:f403:f908::2 ip6:2a01:111:f403:c946::2 ip6:2a01:111:f403:8000::/51 ip6:2a01:111:f403:c000::/51 ip6:2a01:111:f403:f000::/52 exists:%{i}._spf.mta.salesforce.com -all

Processed recursively per RFC 7208

9
exists:
%{i}._spf.mta.salesforce.com
Not exists

Domain does not exist

Lookup cost: 1

Know When Your DNS Records Change

The check you just ran shows your current configuration. But DNS records change, sometimes without you knowing. A well-meaning IT change, a third-party provider update, or an unauthorized modification can break your email delivery overnight.

Configuration Drift

IT changes that accidentally break authentication

Provider Updates

Third-party services changing their SPF includes

Unauthorized Changes

Attackers modifying records to send as you

DMARCTrust monitors your DNS records continuously. When something changes, you get an email alert with exactly what changed and why it matters. No more surprises when customers complain their emails bounced.

Start Monitoring

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Reject policy + valid SPF

Same Policy

Also using none

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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