Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
castlegroup.com
Yes
✓ Yes
Proofpoint
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-19 01:57:55 UTC · ↺ Refresh
MX Hostnames
- mxa-00a16401.gslb.pphosted.com
- mxb-00a16401.gslb.pphosted.com
MX Priorities
- mxb-00a16401.gslb.pphosted.com: 10
- mxa-00a16401.gslb.pphosted.com: 10
A / AAAA Records
- 104.20.47.200 (no PTR)
- 172.66.149.234 (no PTR)
- 2606:4700:10::6814:2fc8 (no PTR)
- 2606:4700:10::ac42:95ea (no PTR)
Mail Server IPs
- 148.163.154.227 ↩ mx0b-00a16401.pphosted.com
SOA Record
Raw SOA
aria.ns.cloudflare.com dns.cloudflare.com 2399172503 10000 2400 604800 1800
Primary NS (mname)
aria.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2399172503
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
darl.ns.cloudflare.com
aria.ns.cloudflare.com
SPF Record
✓ Soft Fail (~all)
v=spf1 include:spf.protection.outlook.com include:mailgun.org include:mail.zendesk.com include:_spf.salesforce.com ip4:170.55.119.2 ip4:208.86.168.7 ip4:148.163.151.27 ip4:148.163.154.227 include:docebosaas.com ~all
📊 DNS lookups: 5/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; pct=100; rua=mailto:[email protected],mailto:[email protected], mailto:[email protected];
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected],mailto:[email protected], mailto:[email protected]
DKIM Selectors
✓ 4 found
selector1._domainkey
selector2._domainkey
s1._domainkey
s2._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
11 records- SPFv=spf1 include:spf.protection.outlook.com include:mailgun.org include:mail.zendesk.com include:_spf.salesforce.com ip4:170.55.119.2 ip4:208.86.168.7 ip4:148.163.151.27 ip4:148.163.154.227 include:docebosaas.com ~all
- 75A50AC48E
- MS=ms63720790
- amazonses:9IQKwy0rY9qbTpzcGEC8z0QxMp6p5FDemK1PU5KECRQ=
- amazonses:H+Q8vau7J3GiKqd5EJFYQHnVq0EgbzHHH7NCr++W57M=
- dropbox-domain-verification=u5qtv9ar404n
- google-site-verification=SsGXpyT0XCuMYUzJAIt9ZafcWqKFgSuSHocXCgtV6so
- google-site-verification=b3hYehtUCy-3h_9av8jwA6jSs-yvCZtNI8esb0MDZ3w
- pardot1074592=aabdea0bfd886c3731eabd06e3b5eb640a34f6e0ce32897a692d854b6936b205
- sending_domain1074592=f815a4505adf6065248f6d6d20d8a5724d365ff9df0fde4a71fd58f491f4b5a4
- thcy642vpqbyj6059rcqqnmwflf3370h
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