Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
isg-one.com
Yes
✓ Yes
Mimecast
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-02 13:43:02 UTC · ↺ Refresh
MX Hostnames
- eu-smtp-inbound-2.mimecast.com
- eu-smtp-inbound-1.mimecast.com
MX Priorities
- eu-smtp-inbound-1.mimecast.com: 10
- eu-smtp-inbound-2.mimecast.com: 10
A / AAAA Records
- 104.16.212.134 (no PTR)
Mail Server IPs
- 195.130.217.201 ↩ eu-smtp-inbound-1.mimecast.com
- 195.130.217.211 ↩ eu-smtp-inbound-2.mimecast.com
- 91.220.42.241 ↩ eu-smtp-inbound-1.mimecast.com
- 91.220.42.211 ↩ eu-smtp-inbound-2.mimecast.com
- 91.220.42.201 ↩ eu-smtp-inbound-1.mimecast.com
- 195.130.217.241 ↩ eu-smtp-inbound-2.mimecast.com
SOA Record
Raw SOA
a1.uberns.com infrastructureteam.isg-one.com 2604010001 14400 7200 1209600 14400
Primary NS (mname)
a1.uberns.com
Admin Email (rname)
infrastructureteam@isg-one.com
Serial
2604010001
Refresh
14400s
Retry
7200s
Expire
1209600s
Minimum TTL
14400s
Nameservers (NS)
a1.uberns.com
b1.uberns.com
SPF Record
✓ Soft Fail (~all)
v=spf1 include:_u.isg-one.com._spf.smart.ondmarc.com include:app.sgizmo.com include:mktomail.com ~all
📊 DNS lookups: 3/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; sp=quarantine; pct=100; fo=1; ri=86400; rua=mailto:[email protected],mailto:[email protected]; ruf=mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected],mailto:[email protected]
↳ Subdomain policy: quarantine
DKIM Selectors
✓ 2 found
s1._domainkey
s2._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: s1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
25 records- google-site-verification=j0ug2Komtn6HYb_gYIkwkAf1YT2JLb8CPsVc_6UTjd0
- canva-site-verification=z6xB39gV1RotztI2U_89BQ
- cisco-ci-domain-verification=30d63515f0d703b664433e2117c0c7f3164f170d8f89cd70ca151512428f0502
- c40bovg9rjjnp8b8vi5cph87r0
- google-site-verification=x69dqFmdy796GD1BMnoM8UzySoDE0WnO-We5lLqTmnM
- sofuctc8pee7q19qcdjk84darq
- adobe-idp-site-verification=3480cc9969c80dd2f6d9ad1525764fab656e799d2935a474856cb2356ffb0b7e
- smartsheet-site-validation=Ip5Ui3rSuB36ujV4EraLmdkshAI6DYmg
- kjtkamhp6i8j2dph1r36q0lv04
- 2NpK0Kor0a+y1bmzVPq4q/VK4C/HSoFpO9Kbr4CT+MPHlfedIJ9uGKy0VytT9XVVOGCZ3aS6FCid1ySf0nZYGA==
- openai-domain-verification=dv-XGjHXSk5wGEI5HMVbIScx7Ik
- dropbox-domain-verification=qoibo0wzej1a
- ca3-1561161b7559402cb01b81dca61ffe7d
- jamf-site-verification=-JO3IbEZqPEHgxOHxoQ4lQ
- sk15omki7ikudant29ij8dtghl
- miro-verification=8e1f024b4a4ed0834fcb020e74cfeda92717e19b
- krisp-domain-verification=ORtVzk4oYkue0Db8xJebmOPVRKFishsC
- google-site-verification=0Gcf8Z2IKpgdmBSUcbGe8KFP8A7B0ZFHReOcVMCmiA8
- apple-domain-verification=63BRYY1uq5pbfQIH
- google-site-verification=vNIBzx93FbC1u3q_kaSnJMVQ5LH0_FFZYuDmYT9ri80
- logmein-verification-code=4351f040-c46c-401d-bf25-f0df31a6d767
- openai-domain-verification=dv-tn4zVVywEqSsgYEfoi0oBW4Y
- SPFv=spf1 include:_u.isg-one.com._spf.smart.ondmarc.com include:app.sgizmo.com include:mktomail.com ~all
- google-site-verification=AUT1tb1OItFqIY_PO7GEaKSLM_-58bt1CRQRtqBz9Kk
- google-site-verification=4wu5XEIgVgwrvgxM6GJi8SyYwXsYjHEMuC95_Yw4Krs
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 isg-one.com
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits