Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
holderoil.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-21 13:49:03 UTC · ↺ Refresh
MX Hostnames
- holderoil-com.mail.protection.outlook.com
MX Priorities
- holderoil-com.mail.protection.outlook.com: 10
A / AAAA Records
- 199.204.212.140 (no PTR)
Mail Server IPs
- 52.101.41.28 ↩ mail-sj0pr03cu01504.inbound.protection.outlook.com
- 52.101.11.2 ↩ mail-sn1pr03cu00102.inbound.protection.outlook.com
- 52.101.10.16 ↩ mail-bn6pr21cu00500.inbound.protection.outlook.com
- 52.101.11.13 ↩ mail-sn1pr0501cu00205.inbound.protection.outlook.com
- 2a01:111:f403:f90f::1 ↩ mail-sa9pr04cu00201.inbound.protection.outlook.com
- 2a01:111:f403:f802:: ↩ mail-byapr05cu00400.inbound.protection.outlook.com
- 2a01:111:f403:f805::1 ↩ mail-co1pr03cu00301.inbound.protection.outlook.com
- 2a01:111:f403:f901::2 ↩ mail-bl2pr02cu00402.inbound.protection.outlook.com
SOA Record
Raw SOA
ns10.digicertdns.com dns.digicertdns.com 2009010268 43200 3600 1209600 180
Primary NS (mname)
ns10.digicertdns.com
Admin Email (rname)
dns@digicertdns.com
Serial
2009010268
Refresh
43200s
Retry
3600s
Expire
1209600s
Minimum TTL
180s
Nameservers (NS)
ns10.digicertdns.com
ns11.digicertdns.com
ns13.digicertdns.net
ns15.digicertdns.net
ns14.digicertdns.net
ns12.digicertdns.com
SPF Record
✓ Strict (-all)
v=spf1 ip4:98.102.242.18 ip4:12.30.2.170 ip4:166.156.134.48 include:spf.protection.outlook.com -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; sp=none; rua=mailto:dmarc_aggregate_analyser+e2cda87deca03a5a8cf5248547534e20@zerobounce.net; ruf=mailto:dmarc_forensics_analyser+e2cda87deca03a5a8cf5248547534e20@zerobounce.net; rf=afrf; pct=100; ri=86400; fo=1;
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:dmarc_aggregate_analyser+e2cda87deca03a5a8cf5248547534e20@zerobounce.net
↳ Subdomain policy: none
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._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
3 records- MS=ms67190869
- SPFv=spf1 ip4:98.102.242.18 ip4:12.30.2.170 ip4:166.156.134.48 include:spf.protection.outlook.com -all
- MS=03DACBA6AEF62CEC6E51836EB0B8E2C2C1A94426
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