Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
gco.com.co
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-29 10:41:55 UTC · ↺ Refresh
MX Hostnames
- gco-com-co.mail.protection.outlook.com
MX Priorities
- gco-com-co.mail.protection.outlook.com: 0
A / AAAA Records
- 179.50.72.195 (no PTR)
Mail Server IPs
- 52.101.9.17 (no PTR)
- 52.101.11.7 ↩ mail-sa9pr04cu00107.inbound.protection.outlook.com
- 52.101.11.9 ↩ mail-sn1pr02cu00101.inbound.protection.outlook.com
- 52.101.8.44 ↩ mail-dm5pr04cu00104.inbound.protection.outlook.com
- 2a01:111:f403:f902::1 ↩ mail-bl2pr02cu00101.inbound.protection.outlook.com
- 2a01:111:f403:f913:: ↩ mail-cy1pr03cu00100.inbound.protection.outlook.com
- 2a01:111:f403:f802::2 ↩ mail-sj2pr05cu00202.inbound.protection.outlook.com
- 2a01:111:f403:f802::1 ↩ mail-sj2pr05cu00101.inbound.protection.outlook.com
SOA Record
Raw SOA
pdns13.domaincontrol.com dns.jomax.net 2026032700 28800 7200 604800 600
Primary NS (mname)
pdns13.domaincontrol.com
Admin Email (rname)
dns@jomax.net
Serial
2026032700
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
600s
Nameservers (NS)
pdns13.domaincontrol.com
pdns14.domaincontrol.com
SPF Record
✓ Strict (-all)
v=spf1 ip4:179.50.73.64/27 include:spf.protection.outlook.com ip4:142.0.176.3/32 ip4:142.0.180.215/32 ip4:142.0.187.52/32 ip4:138.121.12.98/32 include:spf1.masivapp.com include:_spf.us.sendclean.net include:spf.emarsys.net -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1;p=reject;sp=quarantine;adkim=r;aspf=s;pct=100;fo=1;ri=3600;rua=mailto:[email protected];ruf=mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Strict
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: quarantine
DKIM Selectors
✓ 5 found
selector1._domainkey
selector2._domainkey
mail._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
3 records- SPFv=spf1 ip4:179.50.73.64/27 include:spf.protection.outlook.com ip4:142.0.176.3/32 ip4:142.0.180.215/32 ip4:142.0.187.52/32 ip4:138.121.12.98/32 include:spf1.masivapp.com include:_spf.us.sendclean.net include:spf.emarsys.net -all
- google-site-verification=u6j2eNlUnIa-55h6jZmIfGTauotNv6Co3bD8Ctx5ILg
- brevo-code:0cc4c953395a9e3cc0eb1c4789444d01
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