Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
501rt.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-27 00:44:50 UTC · ↺ Refresh
MX Hostnames
- 501rt-com.mail.protection.outlook.com
MX Priorities
- 501rt-com.mail.protection.outlook.com: 0
A / AAAA Records
- 144.217.255.35 ↩ lambda.ldpservers.com
Mail Server IPs
- 52.101.10.10 ↩ mail-bn8pr05cu00102.inbound.protection.outlook.com
- 52.101.41.22 ↩ mail-sj2pr05cu00406.inbound.protection.outlook.com
- 52.101.8.34 ↩ mail-dm2pr04cu00102.inbound.protection.outlook.com
- 52.101.40.6 ↩ mail-cy1pr03cu00106.inbound.protection.outlook.com
- 2a01:111:f403:c946::4 ↩ mail-ch0pr04cu00504.inbound.protection.outlook.com
- 2a01:111:f403:f90a::1 ↩ mail-bn8pr03cu00201.inbound.protection.outlook.com
- 2a01:111:f403:f902::1 ↩ mail-bl2pr02cu00101.inbound.protection.outlook.com
- 2a01:111:f403:c946::7 ↩ mail-ch5pr02cu00307.inbound.protection.outlook.com
SOA Record
Raw SOA
ns1.ldpservers.com epulido93.gmail.com 2026032607 3600 1800 1209600 86400
Primary NS (mname)
ns1.ldpservers.com
Admin Email (rname)
epulido93@gmail.com
Serial
2026032607
Refresh
3600s
Retry
1800s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
ns1.ldpservers.com
ns2.ldpservers.com
SPF Record
✓ Strict (-all)
v=spf1 ip4:144.217.255.35 ip4:192.99.35.201 include:spf.protection.outlook.com -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
DKIM Selectors
✓ 1 found
default._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: default
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
1 record- SPFv=spf1 ip4:144.217.255.35 ip4:192.99.35.201 include:spf.protection.outlook.com -all
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