Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
dcoonline.com
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-14 02:00:39 UTC · ↺ Refresh
MX Hostnames
- mx.paubox.com
MX Priorities
- mx.paubox.com: 10
A / AAAA Records
- 104.21.61.192
- 172.67.213.17
- 2606:4700:3033::6815:3dc0
- 2606:4700:3037::ac43:d511
Mail Server IPs
- 165.140.171.170 ↩ mx.paubox.com
- 165.140.171.169 ↩ mx.paubox.com
- 165.140.171.124 ↩ mx.paubox.com
- 165.140.171.15 ↩ mx.paubox.com
- 165.140.171.199 ↩ mx.paubox.com
- 165.140.171.189 ↩ mx.paubox.com
- 165.140.171.195 ↩ mx.paubox.com
- 165.140.171.155 ↩ mx.paubox.com
- 165.140.171.111 ↩ mx.paubox.com
- 165.140.171.164 ↩ mx.paubox.com
- 165.140.171.143
- 165.140.171.101
- 165.140.171.18
SOA Record
Raw SOA
april.ns.cloudflare.com dns.cloudflare.com 2397103378 10000 2400 604800 1800
Primary NS (mname)
april.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2397103378
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
april.ns.cloudflare.com
ivan.ns.cloudflare.com
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com include:_spf.paubox.com -all
📊 DNS lookups: 2/10
✓ 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
✓ 2 found
s1._domainkey
s2._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: s1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
4 records- MS=ms62737049
- _globalsign-domain-verification=hOFAPdaw2rbeiKrxXtChxN6BekVZ_mWw0Sdqu56CEs
- SPFv=spf1 include:spf.protection.outlook.com include:_spf.paubox.com -all
- MS=4A3A98A317750DF55E07D7F19BC636FFC4FA5B4D
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