Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
coltgrp.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-21 20:13:46 UTC · ↺ Refresh
MX Hostnames
- coltgrp-com.mail.protection.outlook.com
MX Priorities
- coltgrp-com.mail.protection.outlook.com: 0
A / AAAA Records
- 35.244.153.44 ↩ 44.153.244.35.bc.googleusercontent.com
- 34.160.17.71 ↩ 71.17.160.34.bc.googleusercontent.com
- 35.227.194.51
- 34.149.36.179
Mail Server IPs
- 52.101.9.2 ↩ mail-mn2pr02cu00202.inbound.protection.outlook.com
- 52.101.9.0 ↩ mail-bl2pr02cu00100.inbound.protection.outlook.com
- 52.101.41.183 ↩ mail-byapr04cu00307.inbound.protection.outlook.com
- 52.101.41.54 ↩ mail-sj2pr05cu00506.inbound.protection.outlook.com
- 2a01:111:f403:f90c:: ↩ mail-sn1pr03cu00100.inbound.protection.outlook.com
- 2a01:111:f403:c92c::3 ↩ mail-dm5pr04cu00103.inbound.protection.outlook.com
- 2a01:111:f403:f90d::1 ↩ mail-sn1pr0501cu00301.inbound.protection.outlook.com
- 2a01:111:f403:c801::1 ↩ mail-sn1pr0501cu00101.inbound.protection.outlook.com
SOA Record
Raw SOA
ns1.siteground.net admins.siteground.com 153 86400 7200 3600000 86400
Primary NS (mname)
ns1.siteground.net
Admin Email (rname)
admins@siteground.com
Serial
153
Refresh
86400s
Retry
7200s
Expire
3600000s
Minimum TTL
86400s
Nameservers (NS)
ns2.siteground.net
ns1.siteground.net
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com include:coltgrp.com.spf.auto.dnssmarthost.net include:47784073.spf01.hubspotemail.net include:spf.US.exclaimer.net -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; sp=reject; ruf=mailto:[email protected]; rua=mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: reject
DKIM Selectors
✓ 1 found
default._domainkey
✓ Public key: 216 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
6 records- SPFv=spf1 include:spf.protection.outlook.com include:coltgrp.com.spf.auto.dnssmarthost.net include:47784073.spf01.hubspotemail.net include:spf.US.exclaimer.net -all
- Foxit-domain-verification=55baf37223c0e60809b70f3d0144c043
- arcsite-domain-verification=9oGwU7mENgInyFrDMCOP
- MS=ms97092541
- MS=ms80289305
- MS=ms28526360
Full email verification for coltgrp.com
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