Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
islandergroup.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-26 05:33:55 UTC · ↺ Refresh
MX Hostnames
- islandergroup-com.mail.protection.outlook.com
MX Priorities
- islandergroup-com.mail.protection.outlook.com: 0
A / AAAA Records
- 209.43.37.5 ↩ prod2.cirkuit.net
Mail Server IPs
- 52.101.194.3 ↩ mail-ch1pr04cu00103.inbound.protection.outlook.com
- 52.101.194.17 ↩ mail-ch5pr02cu00401.inbound.protection.outlook.com
- 52.101.10.5 ↩ mail-bn6pr04cu00105.inbound.protection.outlook.com
- 52.101.40.1 ↩ mail-cy4pr03cu00101.inbound.protection.outlook.com
- 2a01:111:f403:f913::1 ↩ mail-cy5pr05cu00101.inbound.protection.outlook.com
- 2a01:111:f403:c803:: ↩ mail-bn1pr21cu00200.inbound.protection.outlook.com
- 2a01:111:f403:c801::1 ↩ mail-sn1pr0501cu00101.inbound.protection.outlook.com
- 2a01:111:f403:f90d::1 ↩ mail-sn1pr0501cu00301.inbound.protection.outlook.com
SOA Record
Raw SOA
enterprise.cirkuit.net dnsadmin.cirkuit.net 2007073007 3600 900 1209600 3600
Primary NS (mname)
enterprise.cirkuit.net
Admin Email (rname)
dnsadmin@cirkuit.net
Serial
2007073007
Refresh
3600s
Retry
900s
Expire
1209600s
Minimum TTL
3600s
Nameservers (NS)
ns1.cirkuit.net
ns2.cirkuit.net
SPF Record
✓ Soft Fail (~all)
v=spf1 mx ip4:104.241.97.148 include:_spf.cirkuit.net include:spf.protection.outlook.com include:smtp.isl.stratusmanagedcloud.com ~all
📊 DNS lookups: 4/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; pct=100; rua=mailto:[email protected]
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._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 mx ip4:104.241.97.148 include:_spf.cirkuit.net include:spf.protection.outlook.com include:smtp.isl.stratusmanagedcloud.com ~all
- hp6807arbtksunb3kb8dsmrjhf.
- ceqeokbjrqa09n9omcs9m0b3vr.
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 islandergroup.com
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits