arculus.co

Valid Email Server
Domain Lookup › arculus.co

Domain Overview

DNS: ✓ 21d ago Checker: ✓ 21d ago
arculus.co
Yes
✓ Yes
Barracuda
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-05-20 21:41:39 UTC · ↺ Refresh

Add email validation to your forms — free

Add our free script to block 10,000+ disposable domains + perform other checks. No signup, unlimited checks.

MX validation Disposable detection Role accounts
Add to your signup form
<script src="https://check.verifyswift.com/"></script>
One line · No registration · See full docs & demo → · Customize →

MX Hostnames

  • d276602b.ess.barracudanetworks.com
  • d276602a.ess.barracudanetworks.com

MX Priorities

  • d276602b.ess.barracudanetworks.com: 20
  • d276602a.ess.barracudanetworks.com: 10

A / AAAA Records

  • 172.67.199.3 (no PTR)
  • 104.21.50.13 (no PTR)
  • 2606:4700:3037::6815:320d (no PTR)
  • 2606:4700:3032::ac43:c703 (no PTR)

Mail Server IPs

  • 209.222.82.253 ↩ mail.ess.barracuda.com
  • 209.222.82.255 ↩ mail.ess.barracuda.com
  • 209.222.82.252 ↩ mail.ess.barracuda.com

SOA Record

Raw SOA elias.ns.cloudflare.com dns.cloudflare.com 2404184712 10000 2400 604800 1800
Primary NS (mname)
elias.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2404184712
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s

Nameservers (NS)

mckenzie.ns.cloudflare.com
elias.ns.cloudflare.com

SPF Record

✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com include:mail.zendesk.com include:spf.ess.barracudanetworks.com include:_spf.bigcommerce.com include:mktomail.com -all
📊 DNS lookups: 5/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✓ Reject
v=DMARC1; p=reject; fo=1; rua=mailto:[email protected]; ruf=mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]

DKIM Selectors

✓ 4 found
selector1._domainkey
selector2._domainkey
s1._domainkey
s2._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

14 records
  • cursor-domain-verification-pb3c9h=UzuXyf7pumf0Nxbnfpbs5ej8n
  • docusign=7ddf855f-fe5e-47e6-ab77-e875b6936cbb
  • dtm-domain-verification=KvAzqyiXSfR-3nI6P6y1Wf7CwvOVsU_o9WM1JKfoa50
  • google-site-verification=LLvKnEQYLu43HU8PIL53qls8znMD32yOUh7faqC3Cos
  • klaviyo-site-verification=SzzFZ4
  • knowbe4-site-verification=9c2776052f0a88b37358ebd89e37174d
  • SPFv=spf1 include:spf.protection.outlook.com include:mail.zendesk.com include:spf.ess.barracudanetworks.com include:_spf.bigcommerce.com include:mktomail.com -all
  • wiz-domain-verification=856539f3aa245e350fe85aa92b60978dd9281e75db5c57c57457dde6e6d59b33
  • 8b453c66-8fee-4a05-a795-59f7340ec27f=7ea6060251f60aec61e2408ed88a120a8f5d4b4209ec25e83ecf3f48d6114844
  • MS=ms39096482
  • _j29xdjm0p89cige451vxuqs3ocwxdrm
  • apple-domain-verification=7k2J0YVLnc7tD6xf
  • atlassian-domain-verification=KLKTMLTJGvzcnAjhVUeBBYfwzW3Cs9YWw7KMnGDJE8utM7JKVMPH/kP5/GuHGjmf
  • ca3-85db2fc439e1457fb79a515e45f1353d
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 · Customize →
See demo & docs
Deep verification
Full email verification for arculus.co

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

No credit card required
Get 1,000 Free Credits