Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
colstan.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-23 09:04:11 UTC · ↺ Refresh
MX Hostnames
- colstan-com.mail.protection.outlook.com
MX Priorities
- colstan-com.mail.protection.outlook.com: 0
A / AAAA Records
- 34.149.36.179 ↩ 179.36.149.34.bc.googleusercontent.com
- 35.244.153.44 ↩ 44.153.244.35.bc.googleusercontent.com
- 34.160.17.71
- 34.160.81.203
Mail Server IPs
- 52.101.10.12 ↩ mail-bn1pr21cu00204.inbound.protection.outlook.com
- 52.101.10.5 ↩ mail-bn6pr04cu00105.inbound.protection.outlook.com
- 52.101.41.183 ↩ mail-byapr04cu00307.inbound.protection.outlook.com
- 40.93.192.1 ↩ mail-dm5pr02cu00201.inbound.protection.outlook.com
- 2a01:111:f403:c803:: ↩ mail-bn1pr21cu00200.inbound.protection.outlook.com
- 2a01:111:f403:c902:: ↩ mail-sj2pr05cu00300.inbound.protection.outlook.com
- 2a01:111:f403:c902::3 ↩ mail-sj0pr03cu01703.inbound.protection.outlook.com
- 2a01:111:f403:c801:: ↩ mail-sa9pr02cu00200.inbound.protection.outlook.com
SOA Record
Raw SOA
ns1.siteground.net dnsadmin.usm76.siteground.biz 2020030328 86400 7200 3600000 86400
Primary NS (mname)
ns1.siteground.net
Admin Email (rname)
dnsadmin@usm76.siteground.biz
Serial
2020030328
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:spf.zixsmbhosted.com ip4:66.96.128.0/18 include:outlook.com include:colstan.com.spf.auto.dnssmarthost.net -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; aspf=r; adkim=r;
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
DKIM Selectors
✓ 3 found
default._domainkey
s1._domainkey
s2._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
3 records- SPFv=spf1 include:spf.protection.outlook.com include:spf.zixsmbhosted.com ip4:66.96.128.0/18 include:outlook.com include:colstan.com.spf.auto.dnssmarthost.net -all
- google-site-verification=-RAkTdcEQh9maT7EwPNjYeztT3I6jFXa3r5tZ009CGU
- google-site-verification=j1kwiDhsezu8UmqTBB_bnJ1GdkUzOO9qUMj54GXxWe4
Full email verification for colstan.com
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