Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
dukemfg.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-21 19:48:33 UTC · ↺ Refresh
MX Hostnames
- dukemfg-com.mail.protection.outlook.com
MX Priorities
- dukemfg-com.mail.protection.outlook.com: 0
A / AAAA Records
- 3.19.166.23 ↩ ec2-3-19-166-23.us-east-2.compute.amazonaws.com
Mail Server IPs
- 52.101.11.17 ↩ mail-sn1pr0501cu00301.inbound.protection.outlook.com
- 52.101.40.24 ↩ mail-cy5pr05cu00100.inbound.protection.outlook.com
- 52.101.10.2 ↩ mail-bn8pr03cu00202.inbound.protection.outlook.com
- 52.101.10.18 ↩ mail-bn8pr05cu00302.inbound.protection.outlook.com
- 2a01:111:f403:f912:: ↩ mail-cy5pr03cu00200.inbound.protection.outlook.com
- 2a01:111:f403:f804::1 ↩ mail-co1pr05cu00301.inbound.protection.outlook.com
- 2a01:111:f403:f90c:: ↩ mail-sn1pr03cu00100.inbound.protection.outlook.com
- 2a01:111:f403:f90f:: ↩ mail-sa9pr04cu00100.inbound.protection.outlook.com
SOA Record
Raw SOA
ns-234.awsdns-29.com awsdns-hostmaster.amazon.com 2021091301 7200 900 1209600 86400
Primary NS (mname)
ns-234.awsdns-29.com
Admin Email (rname)
awsdns-hostmaster@amazon.com
Serial
2021091301
Refresh
7200s
Retry
900s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
ns-1207.awsdns-22.org
ns-1568.awsdns-04.co.uk
ns-234.awsdns-29.com
ns-682.awsdns-21.net
SPF Record
✓ Strict (-all)
v=spf1 mx include:spf.protection.outlook.com include:_spf.salesforce.com include:_spf.psm.knowbe4.com include:_spf.saashr.com include:us._netblocks.mimecast.com -all
📊 DNS lookups: 6/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1;
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 4 found
selector1._domainkey
selector2._domainkey
s1._domainkey
s2._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
10 records- SPFv=spf1 mx include:spf.protection.outlook.com include:_spf.salesforce.com include:_spf.psm.knowbe4.com include:_spf.saashr.com include:us._netblocks.mimecast.com -all
- y143ft5YC14AFjJ/BtWKgmDHpUkkyYwFhvRHZkWOSnEjUj0TdUYCr76w9P3ybNIPPbpiShL3OJ3W329nMCKhMQ==
- 3h6elp4u0b1elkjgii0h6pm4cg
- apple-domain-verification=AozH7gzDULW1Ytwp
- atlassian-domain-verification=SnHRdAmTlcvRBAkfW0uGKM07CI4KrGRso5WoGtSbWSCVISaQDKbfadNFBIaEipGD
- duo_sso_verification=oT6pUc3wJzK6xxpVVAYZCKnG1deWztwFZ2ppoc6qkrJPIfzg7GlomsHGBuRYmPho
- google-site-verification=-TDGZZUdlPKfOpts3vHAPzQaPV9MqAdDr2yIVDz3RQ0
- ms=ms41187174
- o7ihh5l47v20h3g6dqgtd0k8m3
- ukj69trdm669bedcl0bdcul08f
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