Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
optonline.net
Yes
✓ Yes
Unknown
No
Yes
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-17 21:16:33 UTC · ↺ Refresh
MX Hostnames
- mx.altice.prod.cloud.openwave.ai
MX Priorities
- mx.altice.prod.cloud.openwave.ai: 10
A / AAAA Records
- 167.206.148.154 ↩ webmail.optonline.net
Mail Server IPs
- 66.179.105.18 (no PTR)
SOA Record
Raw SOA
authns1.cv.net hostmaster.cv.net 86498 7200 600 604800 900
Primary NS (mname)
authns1.cv.net
Admin Email (rname)
hostmaster@cv.net
Serial
86498
Refresh
7200s
Retry
600s
Expire
604800s
Minimum TTL
900s
Nameservers (NS)
authns1.cv.net
authns1.cvnet.com
SPF Record
✓ Soft Fail (~all)
v=spf1 include:optimum.net ~all
📊 DNS lookups: 1/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✗ p=none
v=DMARC1;p=none
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
DKIM Selectors
✗ None detectedNo DKIM records found for common selectors — your provider may use a custom selector name.
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
2 records- SPFv=spf1 include:optimum.net ~all
- google-site-verification=ecQe8kI5-qgtejtKiItbqbQu_jjnz_Lp6eJrHhErmaQ
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 optonline.net
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits