Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
3castillos.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-31 09:05:47 UTC · ↺ Refresh
MX Hostnames
- 3castillos-com.mail.protection.outlook.com
MX Priorities
- 3castillos-com.mail.protection.outlook.com: 0
A / AAAA Records
- 104.156.52.210 ↩ sd01.pdhosting.com
Mail Server IPs
- 52.101.41.28 ↩ mail-sj0pr03cu01504.inbound.protection.outlook.com
- 52.101.9.12 ↩ mail-bl0pr05cu00504.inbound.protection.outlook.com
- 52.101.9.0 ↩ mail-bl2pr02cu00100.inbound.protection.outlook.com
- 52.101.41.6 ↩ mail-sj0pr03cu01406.inbound.protection.outlook.com
- 2a01:111:f403:c91d::b ↩ mail-mw2pr02cu00603.inbound.protection.outlook.com
- 2a01:111:f403:f90d:: ↩ mail-sn1pr0501cu00200.inbound.protection.outlook.com
- 2a01:111:f403:c922::1 ↩ mail-bl0pr05cu00501.inbound.protection.outlook.com
- 2a01:111:f403:c902::7 ↩ mail-sj0pr02cu00107.inbound.protection.outlook.com
SOA Record
Raw SOA
ns1.systemdns.com hostmaster.systemdns.com 1771971085 10800 3600 1209600 60
Primary NS (mname)
ns1.systemdns.com
Admin Email (rname)
hostmaster@systemdns.com
Serial
1771971085
Refresh
10800s
Retry
3600s
Expire
1209600s
Minimum TTL
60s
Nameservers (NS)
ns3.systemdns.com
ns1.systemdns.com
ns2.systemdns.com
SPF Record
✓ Strict (-all)
v=spf1 +a +mx include:spf.protection.outlook.com include:spf.pdhosting.com include:zcsend.net include:_spf.google.com -all
📊 DNS lookups: 6/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; pct=100; 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
✓ 3 found
selector1._domainkey
selector2._domainkey
default._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
7 records- MS=ms74312843
- 12072021
- 10.09.2025
- S=8CCEEA65D7E48A30A8CD76CD1FAB0784812CDE4B
- google-site-verification=oMCPGtI0S5cW9kK36X1FyKIrgtuc4uWrrCBA9Z2QASE
- SPFv=spf1 +a +mx include:spf.protection.outlook.com include:spf.pdhosting.com include:zcsend.net include:_spf.google.com -all
- yandex-verification: 9a768f633a20f5fe
Full email verification for 3castillos.com
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