Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
crystaltreecc.org
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-23 03:42:40 UTC · ↺ Refresh
MX Hostnames
- crystaltreecc-org.mail.protection.outlook.com
MX Priorities
- crystaltreecc-org.mail.protection.outlook.com: 0
A / AAAA Records
- 104.21.41.214 (no PTR)
- 172.67.151.172 (no PTR)
- 2606:4700:3037::ac43:97ac
- 2606:4700:3035::6815:29d6
Mail Server IPs
- 52.101.9.26 ↩ mail-bl0pr02cu00702.inbound.protection.outlook.com
- 52.101.11.17 ↩ mail-sn1pr0501cu00301.inbound.protection.outlook.com
- 52.101.50.4 ↩ mail-co1pr03cu00404.inbound.protection.outlook.com
- 52.101.10.10 ↩ mail-bn8pr05cu00102.inbound.protection.outlook.com
- 2a01:111:f403:f902::1 ↩ mail-bl2pr02cu00101.inbound.protection.outlook.com
- 2a01:111:f403:c91d:: ↩ mail-mw2pr04cu00100.inbound.protection.outlook.com
- 2a01:111:f403:c936:: ↩ mail-cy1pr05cu00400.inbound.protection.outlook.com
- 2a01:111:f403:c902::14 ↩ mail-byapr04cu00204.inbound.protection.outlook.com
SOA Record
Raw SOA
yichun.ns.cloudflare.com dns.cloudflare.com 2396594672 10000 2400 604800 1800
Primary NS (mname)
yichun.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2396594672
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
yichun.ns.cloudflare.com
zita.ns.cloudflare.com
SPF Record
✓ Strict (-all)
v=spf1 a mx ptr ip4:8.24.204.8/29 ip4:8.24.204.16/31 ip4:8.24.204.18/32 ip4:168.245.14.77/32 ip4:168.245.126.209/32 ip4:168.245.121.127/32 ip4:50.31.61.116/32 include:sendgrid.net include:spf.protection.outlook.com -all
📊 DNS lookups: 5/10
✓ 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
✓ 4 found
selector1._domainkey
selector2._domainkey
s1._domainkey
s2._domainkey
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
2 records- SPFv=spf1 a mx ptr ip4:8.24.204.8/29 ip4:8.24.204.16/31 ip4:8.24.204.18/32 ip4:168.245.14.77/32 ip4:168.245.126.209/32 ip4:168.245.121.127/32 ip4:50.31.61.116/32 include:sendgrid.net include:spf.protection.outlook.com -all
- MS=ms64188263
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