Domain Overview
DNS: ✓ 2d ago
Checker: ✓ 2d ago
lubyolson.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-05-18 19:13:13 UTC · ↺ Refresh
MX Hostnames
- lubyolson-com.mail.protection.outlook.com
MX Priorities
- lubyolson-com.mail.protection.outlook.com: 10
A / AAAA Records
- 104.21.23.219 (no PTR)
- 172.67.213.244 (no PTR)
- 2606:4700:3033::ac43:d5f4
- 2606:4700:3031::6815:17db
Mail Server IPs
- 52.101.11.3 ↩ mail-sn1pr0501cu00103.inbound.protection.outlook.com
- 52.101.8.44 ↩ mail-dm5pr04cu00104.inbound.protection.outlook.com
- 52.101.11.17 ↩ mail-sn1pr0501cu00301.inbound.protection.outlook.com
- 52.101.10.5 ↩ mail-bn6pr04cu00105.inbound.protection.outlook.com
- 2a01:111:f403:c922:: ↩ mail-bl0pr03cu00200.inbound.protection.outlook.com
- 2a01:111:f403:c946::4 ↩ mail-ch0pr04cu00504.inbound.protection.outlook.com
- 2a01:111:f403:c902::6 ↩ mail-sj0pr21cu00106.inbound.protection.outlook.com
- 2a01:111:f403:c927:: ↩ mail-bn6pr21cu00500.inbound.protection.outlook.com
SOA Record
Raw SOA
major.ns.cloudflare.com dns.cloudflare.com 2402857613 10000 2400 604800 1800
Primary NS (mname)
major.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2402857613
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
major.ns.cloudflare.com
rosa.ns.cloudflare.com
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com ip4:32.218.148.161 -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1;p=quarantine;pct=100;rua=mailto:[email protected];ruf=mailto:[email protected]
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._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
3 records- ca3-65797c6070914cadba72fc81c346dffc
- SPFv=spf1 include:spf.protection.outlook.com ip4:32.218.148.161 -all
- MS=ms75456138
Full email verification for lubyolson.com
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