Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
armstrong.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-19 10:49:35 UTC · ↺ Refresh
MX Hostnames
- armstrong-com.mail.protection.outlook.com
MX Priorities
- armstrong-com.mail.protection.outlook.com: 5
A / AAAA Records
- 104.18.8.56 (no PTR)
Mail Server IPs
- 52.101.194.4 ↩ mail-ch4pr04cu00104.inbound.protection.outlook.com
- 52.101.11.15 ↩ mail-sa9pr02cu00207.inbound.protection.outlook.com
- 52.101.194.13 ↩ mail-ch0pr04cu00605.inbound.protection.outlook.com
- 52.101.41.183 ↩ mail-byapr04cu00307.inbound.protection.outlook.com
- 2a01:111:f403:f901::2 ↩ mail-bl2pr02cu00402.inbound.protection.outlook.com
- 2a01:111:f403:f90c:: ↩ mail-sn1pr03cu00100.inbound.protection.outlook.com
- 2a01:111:f403:f912:: ↩ mail-cy5pr03cu00200.inbound.protection.outlook.com
- 2a01:111:f403:c922:: ↩ mail-bl0pr03cu00200.inbound.protection.outlook.com
SOA Record
Raw SOA
ns1.armstrongceilings.com hostmaster.armstrong.com 2021032289 7200 3600 1209600 900
Primary NS (mname)
ns1.armstrongceilings.com
Admin Email (rname)
hostmaster@armstrong.com
Serial
2021032289
Refresh
7200s
Retry
3600s
Expire
1209600s
Minimum TTL
900s
Nameservers (NS)
ns3.armstrongceilings.com
ns1.armstrongceilings.com
ns2.armstrong.com
ns2.armstrongceilings.com
SPF Record
✓ Strict (-all)
v=spf1 include:1mejfo01j.spf.checkpoint-spf.com include:spf.protection.outlook.com -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1;p=reject;ruf=mailto:[email protected];rua=mailto:[email protected]
✓ 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: 392 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
12 records- SPFv=spf1 include:1mejfo01j.spf.checkpoint-spf.com include:spf.protection.outlook.com -all
- docusign=dd12a541-6d35-41f0-8165-c35ee6fec9b9
- sprout-social-8ecc73cc-7694-475e-a675-b5c49c7b4771
- anthropic-domain-verification-8e345x=cjpIvKkS390lPoznKzCIpa4HY
- cursor-domain-verification-wmfwyt=7qO5Pr2ZjBzRAhJeHNNMmOikT
- have-i-been-pwned-verification=c01e0a963f4a495ebc3d5bc22b9b2a6f
- MS=ms34778906
- gCKaKaPOl4OQkesMv9pTYDqqwH7H+kSunQ5lfcr0Wrs00P4GJwKT1i7P3vn7mnPSYy3McMs4BJ+7r3y5nBU1Eg==
- wOGIuJRAs6gKfed3EDoEvf30dFot8yMHWPTg4wERhnWB7IiyBmWru5QcUyEPJR3f29FK+FK3mbXP3/6nJnjQnQ==
- have-i-been-pwned-verification=dweb_0n5973fmzl0zeu2iubevlktr
- knowbe4-site-verification=9e870abae62564f014c2aa8eb16484e6
- miro-verification=27b3df492d5add84e1d093de6a81519d93961d74
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