Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
big.com.mx
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-29 13:03:45 UTC · ↺ Refresh
MX Hostnames
- mail.big.com.mx
MX Priorities
- mail.big.com.mx: 10
A / AAAA Records
- 174.136.57.138 ↩ coolcloud501.coolcom.com
Mail Server IPs
- 174.136.57.138 ↩ coolcloud501.coolcom.com
SOA Record
Raw SOA
ns7.coolcom.com serverhenk.coolcom.com 2026020601 3600 1800 1209600 86400
Primary NS (mname)
ns7.coolcom.com
Admin Email (rname)
serverhenk@coolcom.com
Serial
2026020601
Refresh
3600s
Retry
1800s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
ns777.coolcom.com
ns77.coolcom.com
ns7.coolcom.com
SPF Record
✓ Soft Fail (~all)
v=spf1 ip4:174.136.57.138 +include:_spf.google.com ~all
📊 DNS lookups: 1/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✗ p=none
v=DMARC1;p=none;sp=none;adkim=r;aspf=r;pct=100;fo=0;rf=afrf;ri=86400
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
↳ Subdomain policy: none
DKIM Selectors
✓ 1 found
default._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: default
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
1 record- SPFv=spf1 ip4:174.136.57.138 +include:_spf.google.com ~all
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