onetetra.com

Valid Email Server

Domain Overview

DNS: โœ“ 1mo ago Checker: โœ“ 1mo ago
onetetra.com
Yes
โœ“ Yes
Outlook
No
No
โš  Yes
No
No

Checked via [email protected] ยท 2026-04-06 15:58:29 UTC ยท โ†บ Refresh

MX Hostnames

  • onetetra-com.mail.protection.outlook.com

MX Priorities

  • onetetra-com.mail.protection.outlook.com: 0

A / AAAA Records

  • 104.26.14.6 (no PTR)
  • 104.26.15.6 (no PTR)
  • 172.67.71.80
  • 2606:4700:20::681a:e06
  • 2606:4700:20::ac43:4750
  • 2606:4700:20::681a:f06

Mail Server IPs

  • 52.101.41.22 โ†ฉ mail-sj2pr05cu00406.inbound.protection.outlook.com
  • 52.101.50.1 โ†ฉ mail-co1pr05cu00401.inbound.protection.outlook.com
  • 52.101.50.13 โ†ฉ mail-mw2pr02cu00605.inbound.protection.outlook.com
  • 52.101.41.3 โ†ฉ mail-sj2pr05cu00103.inbound.protection.outlook.com
  • 2a01:111:f403:f912:: โ†ฉ mail-cy5pr03cu00200.inbound.protection.outlook.com
  • 2a01:111:f403:c92c::2 โ†ฉ mail-dm2pr04cu00102.inbound.protection.outlook.com
  • 2a01:111:f403:f905::3 โ†ฉ mail-dm5pr02cu00203.inbound.protection.outlook.com
  • 2a01:111:f403:f902::2 โ†ฉ mail-mn2pr02cu00202.inbound.protection.outlook.com

SOA Record

Raw SOA gracie.ns.cloudflare.com dns.cloudflare.com 2400628628 10000 2400 604800 1800
Primary NS (mname)
gracie.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2400628628
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s

Nameservers (NS)

peyton.ns.cloudflare.com
gracie.ns.cloudflare.com

SPF Record

โœ“ Soft Fail (~all)
v=spf1 ip4:216.227.242.98 ip4:50.31.32.0/19 ip4:149.72.0.0/16 ip4:167.89.0.0/17 ip4:168.245.0.0/17 ip4:192.254.112.0/20 ip4:198.21.0.0/21 ip4:198.37.144.0/20 ip4:208.117.48.0/20 ip4:216.71.146.120 ip4:216.71.149.106 a:secmail.ultipro.com include:spf.protection.outlook.com include:6653412.spf02.hubspotemail.net include:_spf.salesforce.com ~all
๐Ÿ“Š DNS lookups: 4/10
~ Soft fail (~all) โ€” moderate enforcement

DMARC Record

โœ“ Reject
v=DMARC1; p=reject; rua=mailto:[email protected];
โœ“ Reject โ€” strongest protection
๐Ÿ“‹ SPF alignment: Relaxed ยท DKIM alignment: Relaxed
๐Ÿ“ง Reports โ†’ mailto:[email protected]

DKIM Selectors

โœ“ 2 found
selector1._domainkey
selector2._domainkey
โœ“ Public key: 392 chars (valid)
โœ“ DKIM properly configured for selector: selector1

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

All TXT Records

10 records
  • atlassian-sending-domain-verification=0cfea80c-d635-4dc8-8c24-d21c145190f1
  • docusign=e6a41f26-9b68-405a-a58e-05ca698cdd92
  • google-site-verification=yMvugmMfIjXuLsrpOXrd1lasUeZ0-bsLQNSMHS7nfHY
  • t8vf3n22t4tp0pvvm30bjkp6lzrkssdt
  • SPFv=spf1 ip4:216.227.242.98 ip4:50.31.32.0/19 ip4:149.72.0.0/16 ip4:167.89.0.0/17 ip4:168.245.0.0/17 ip4:192.254.112.0/20 ip4:198.21.0.0/21 ip4:198.37.144.0/20 ip4:208.117.48.0/20 ip4:216.71.146.120 ip4:216.71.149.106 a:secmail.ultipro.com include:spf.protection.outlook.com include:6653412.spf02.hubspotemail.net include:_spf.salesforce.com ~all
  • MS=ms16391909
  • _ejt5t1z4d9fv4dhuv6z8b9olvefv40m
  • anthropic-domain-verification-ekpthh=eaZa2HzpbNcyxggJthBdmzzBi
  • apple-domain-verification=VZd30dgpjaQzxMcN
  • atlassian-domain-verification=TchMSfDReOexkAfB1IXGnmaeYyy-dDUDMAloZ7pxcRHmOan0gboB58W2qGbxMxoi
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 onetetra.com

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

No credit card required
Get 1,000 Free Credits