castroalonso.com

Valid Email Server
Domain Lookup › castroalonso.com

Domain Overview

DNS: ✓ 1h ago Checker: ✓ 1h ago
castroalonso.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-09-23 08:48:08 UTC · ↺ Refresh

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MX Hostnames

  • castroalonso-com.mail.protection.outlook.com

MX Priorities

  • castroalonso-com.mail.protection.outlook.com: 0

A / AAAA Records

  • 217.160.0.80 ↩ 217-160-0-80.elastic-ssl.ui-r.com
  • 2001:8d8:100f:f000::280 ↩ 2001-08d8-100f-f000-0000-0000-0000-0280.elastic-ssl.ui-r.com

Mail Server IPs

  • 52.101.73.153 ↩ mail-as8pr05cu00401.inbound.protection.outlook.com
  • 52.101.185.114 ↩ mail-zrxpr04cu00102.inbound.protection.outlook.com
  • 52.101.68.39 ↩ mail-db7pr03cu00607.inbound.protection.outlook.com
  • 52.101.185.21 ↩ mail-zrxpr05cu00105.inbound.protection.outlook.com
  • 2a01:111:f403:ca3c::a ↩ mail-zrxpr07cu00102.inbound.protection.outlook.com
  • 2a01:111:f403:ca09::26 ↩ mail-am8pr83cu00106.inbound.protection.outlook.com
  • 2a01:111:f403:ca3c::8 ↩ mail-zrxpr05cu00100.inbound.protection.outlook.com
  • 2a01:111:f403:ca04::10 ↩ mail-dbapr03cu00100.inbound.protection.outlook.com

SOA Record

Raw SOA ns1123.ui-dns.org hostmaster.1und1.com 2017060279 28800 7200 604800 600
Primary NS (mname)
ns1123.ui-dns.org
Admin Email (rname)
hostmaster@1und1.com
Serial
2017060279
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
600s

Nameservers (NS)

ns1018.ui-dns.biz
ns1076.ui-dns.com
ns1099.ui-dns.de
ns1123.ui-dns.org

SPF Record

✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1; pct=10
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
⚠ Policy applies to 10% of failing messages only

DKIM Selectors

✗ None detected

No DKIM records found for common selectors — your provider may use a custom selector name.

Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses

All TXT Records

3 records
  • 446c9204f3a98014176e3a7304d620769ae998a0
  • SPFv=spf1 include:spf.protection.outlook.com -all
  • brevo-code:570751c106a01328c4474ea457685aeb
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