Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
redcol.co
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-01 05:21:32 UTC · ↺ Refresh
MX Hostnames
- redcol-co.mail.protection.outlook.com
MX Priorities
- redcol-co.mail.protection.outlook.com: 0
A / AAAA Records
- 192.124.249.37 ↩ cloudproxy10037.sucuri.net
Mail Server IPs
- 52.101.73.15 ↩ mail-am9pr04cu00107.inbound.protection.outlook.com
- 52.101.73.30 ↩ mail-am7pr05cu00306.inbound.protection.outlook.com
- 52.101.68.32 ↩ mail-db3pr0202cu00200.inbound.protection.outlook.com
- 52.101.73.1 ↩ mail-am3pr04cu00501.inbound.protection.outlook.com
- 2a01:111:f403:ca04::f ↩ mail-db7pr03cu00507.inbound.protection.outlook.com
- 2a01:111:f403:ca04::a ↩ mail-du0pr03cu00102.inbound.protection.outlook.com
- 2a01:111:f403:ca04:: ↩ mail-db3pr0202cu00100.inbound.protection.outlook.com
- 2a01:111:f403:ca09::4 ↩ mail-am0pr04cu00504.inbound.protection.outlook.com
SOA Record
Raw SOA
ns1-04.azure-dns.com azuredns-hostmaster.microsoft.com 1 3600 300 2419200 300
Primary NS (mname)
ns1-04.azure-dns.com
Admin Email (rname)
azuredns-hostmaster@microsoft.com
Serial
1
Refresh
3600s
Retry
300s
Expire
2419200s
Minimum TTL
300s
Nameservers (NS)
ns2-04.azure-dns.net
ns3-04.azure-dns.org
ns4-04.azure-dns.info
ns1-04.azure-dns.com
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com include:6240508.spf04.hubspotemail.net -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; pct=100; fo=1; ri=3600; rua=mailto:[email protected]; ruf=mailto:[email protected];
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 3 found
google._domainkey
selector1._domainkey
selector2._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: google
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
4 records- MS=ms41913962
- SPFv=spf1 include:spf.protection.outlook.com include:6240508.spf04.hubspotemail.net -all
- google-site-verification=9k22xTf7sOPAhyPX7XEXDVNlqb5O2783MxQG7PQsLC8
- iu8armps639jbtvi4ls1jk163n
Full email verification for redcol.co
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
SPF / DKIM / DMARC Get 1,000 Free Credits