mastertax.com

Valid Email Server
Domain Lookup › mastertax.com

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
mastertax.com
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-23 18:21:42 UTC · ↺ Refresh

MX Hostnames

  • smtp.secureserver.net
  • mailstore1.secureserver.net

MX Priorities

  • mailstore1.secureserver.net: 10
  • smtp.secureserver.net: 0

A / AAAA Records

  • 170.146.237.61 ↩ eease-iat.adp.com

Mail Server IPs

  • 216.69.141.162 ↩ osplibsmtp02-v02.prod.phx3.secureserver.net
  • 216.69.141.78 ↩ osplibsmtp01-v02.prod.phx3.secureserver.net
  • 216.69.141.114 ↩ osplibsmtp03-v02.prod.phx3.secureserver.net
  • 216.69.141.113 ↩ osplibsmtp03-v01.prod.phx3.secureserver.net
  • 216.69.141.84 ↩ osplibsmtp02-v01.prod.phx3.secureserver.net
  • 216.69.141.71 ↩ osplibsmtp01-v01.prod.phx3.secureserver.net

SOA Record

Raw SOA dc01exdnsgm.net.adp.com hostmaster.adp.com 3058 10800 3600 2592000 60
Primary NS (mname)
dc01exdnsgm.net.adp.com
Admin Email (rname)
hostmaster@adp.com
Serial
3058
Refresh
10800s
Retry
3600s
Expire
2592000s
Minimum TTL
60s

Nameservers (NS)

a1-199.akam.net
a14-65.akam.net
dns3.p01.nsone.net
dns2.p01.nsone.net
a28-64.akam.net
a18-66.akam.net
dns4.p01.nsone.net
a9-67.akam.net
dns1.p01.nsone.net
a5-66.akam.net

SPF Record

✗ Invalid
v=spf1 -all
📊 DNS lookups: 0/10
⚠ Strict -all with no allowed senders — no servers can send email for this domain.

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

✗ None detected

No 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

6 records
  • dysk770c82htfywhhtjysggv5dh1r09j
  • _tx3rpkvwy12ush96fwyqiml519olc56
  • SPFv=spf1 -all
  • google-site-verification=2H7io-OuMgndr2Sfjp6LpmKmRivnPYaDsMjXeBDyfGo
  • lj3ifn5up7ofqnno520229jdvb
  • _6wjluf4r8s1xppo5b36pqdrihsgemmf
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 mastertax.com

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

No credit card required
Get 1,000 Free Credits