nsbonline.com

Valid Email Server
Live data โ€” DNS records and disposable check were just fetched and saved.

Domain Overview

DNS: โšก live Checker: โšก live
nsbonline.com
Yes
โœ“ Yes
Unknown
No
No
โš  Yes
No
No

Checked via [email protected] ยท 2026-05-21 08:54:45 UTC ยท โ†บ Refresh

MX Hostnames

  • nsbonline-com.mx2.arsmtp.com
  • nsbonline-com.mx1.arsmtp.com

MX Priorities

No priority data.

A / AAAA Records

  • 104.18.24.218
  • 104.18.25.218

Mail Server IPs

No IPs resolved.

SOA Record

No SOA record found.

Nameservers (NS)

ns2.lexsynergy.us
ns1.lexsynergy.net
ns3.lexsynergy.info

SPF Record

โœ“ Soft Fail (~all)
v=spf1 include:7ir1dnnwdh.powerspf.com ip4:44.214.246.148 ~all
๐Ÿ“Š DNS lookups: 1/10
~ Soft fail (~all) โ€” moderate enforcement

DMARC Record

~ Quarantine
v=DMARC1; p=quarantine; sp=none; rua=mailto:[email protected]; ruf=mailto:[email protected]; pct=100; fo=1;
~ Quarantine โ€” good protection (failing mail goes to spam)
๐Ÿ“‹ SPF alignment: Relaxed ยท DKIM alignment: Relaxed
๐Ÿ“ง Reports โ†’ mailto:[email protected]
โ†ณ Subdomain policy: none

DKIM Selectors

โœ“ 1 found
k1._domainkey
โœ“ Public key: 216 chars (valid)
โœ“ DKIM properly configured for selector: k1

Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses

All TXT Records

7 records
  • sprout-social-ba5312b4-3fdf-4cf4-8bd6-0d7dd72d6d6f
  • ms-domain-verification=180294eb-ba7c-457a-95a7-a46c0845d0c0
  • SPFv=spf1 include:7ir1dnnwdh.powerspf.com ip4:44.214.246.148 ~all
  • duo_sso_verification=2xb8FdJKC2k0oKI0qJqolDqi10mRqQSGzZHTAcXNVDvaSnYgAlpOrhQjwTXhmVix
  • ZOOM_verify_SLgGQk3pnWHGv037GISYTh
  • MS=206AFEC6F63C7CD7C89B9CF66D6D05BA6C097706
  • fp28l9BJzX+99TcxrYOB6zZQHDILOPCUsNtbg0CrszE=
Free ยท No signup required
Add email validation to your forms

Block disposable emails, validate MX records, detect role accounts โ€” unlimited, forever free.

<script src="https://check.verifyswift.com/"></script>
One line of code ยท Works on any site
See demo & docs
Deep verification
Full email verification for nsbonline.com

SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.

No credit card required
Get 1,000 Free Credits