Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
comstar.biz
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-29 15:00:21 UTC · ↺ Refresh
MX Hostnames
- comstar-biz.mail.protection.outlook.com
MX Priorities
- comstar-biz.mail.protection.outlook.com: 0
A / AAAA Records
- 162.215.171.15 ↩ server-598580.intercentric.com
Mail Server IPs
- 52.101.11.2 ↩ mail-sn1pr03cu00102.inbound.protection.outlook.com
- 52.101.194.13 ↩ mail-ch0pr04cu00605.inbound.protection.outlook.com
- 52.101.10.8 ↩ mail-bn1pr04cu00100.inbound.protection.outlook.com
- 52.101.41.3 ↩ mail-sj2pr05cu00103.inbound.protection.outlook.com
- 2a01:111:f403:f901::2 ↩ mail-bl2pr02cu00402.inbound.protection.outlook.com
- 2a01:111:f403:f905::4 ↩ mail-dm2pr04cu00404.inbound.protection.outlook.com
- 2a01:111:f403:f910:: ↩ mail-cy5pr03cu00300.inbound.protection.outlook.com
- 2a01:111:f403:c803:: ↩ mail-bn1pr21cu00200.inbound.protection.outlook.com
SOA Record
Raw SOA
polaris.wauknet.com dnsadmin.comstarllc.com 1434 300 600 86400 3600
Primary NS (mname)
polaris.wauknet.com
Admin Email (rname)
dnsadmin@comstarllc.com
Serial
1434
Refresh
300s
Retry
600s
Expire
86400s
Minimum TTL
3600s
Nameservers (NS)
polaris.wauknet.com
crux.wauknet.com
vega.wauknet.com
SPF Record
✓ Soft Fail (~all)
v=spf1 ip4:162.215.171.15 include:spf.protection.outlook.com ~all
📊 DNS lookups: 1/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; fo=s;
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
DKIM Selectors
✓ 3 found
selector1._domainkey
selector2._domainkey
default._domainkey
✓ Public key: 392 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
2 records- MS=ms64828346
- SPFv=spf1 ip4:162.215.171.15 include:spf.protection.outlook.com ~all
Free · No signup required
Add email validation to your forms
Block disposable emails, validate MX records, detect role accounts — unlimited, forever free.
<script src="https://check.verifyswift.com/"></script>
One line of code · Works on any site
See demo & docs
Deep verification
Full email verification for comstar.biz
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits