Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
massteacher.org
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-18 05:45:58 UTC · ↺ Refresh
MX Hostnames
- massteacher-org.mail.protection.outlook.com
MX Priorities
- massteacher-org.mail.protection.outlook.com: 0
A / AAAA Records
- 104.19.252.49 (no PTR)
- 104.19.251.49 (no PTR)
Mail Server IPs
- 52.101.42.18 ↩ mail-co1pr03cu00302.inbound.protection.outlook.com
- 52.101.8.44 ↩ mail-dm5pr04cu00104.inbound.protection.outlook.com
- 52.101.50.1 ↩ mail-co1pr05cu00401.inbound.protection.outlook.com
- 52.101.40.24 ↩ mail-cy5pr05cu00100.inbound.protection.outlook.com
- 2a01:111:f403:c927::1 ↩ mail-bn8pr05cu00301.inbound.protection.outlook.com
- 2a01:111:f403:c946::7 ↩ mail-ch5pr02cu00307.inbound.protection.outlook.com
- 2a01:111:f403:c902::2 ↩ mail-sj0pr03cu01602.inbound.protection.outlook.com
- 2a01:111:f403:f908::2 ↩ mail-bn8pr05cu00102.inbound.protection.outlook.com
SOA Record
Raw SOA
ns57.worldnic.com namehost.worldnic.com 126022615 10800 3600 604800 3600
Primary NS (mname)
ns57.worldnic.com
Admin Email (rname)
namehost@worldnic.com
Serial
126022615
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
ns58.worldnic.com
ns57.worldnic.com
SPF Record
✓ Strict (-all)
v=spf1 a mx ip4:172.85.51.146 ip4:50.201.154.234 ip4:96.95.183.177 ip4:208.112.82.170 include:spf.protection.outlook.com include:servers.mcsv.net include:icpbounce.com include:_spfprod.ngpvan.com include:spf1.formassembly.com -all
📊 DNS lookups: 7/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; rua=mailto:[email protected]
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 3 found
selector1._domainkey
selector2._domainkey
k1._domainkey
✓ Public key: 216 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
10 records- wpe-verification=mtawebsites
- apple-domain-verification=wuqOSNhfvEFFNP9a
- facebook-domain-verification=oc8n90lvupdi27a1xwkbp738rdcrul
- FifJJ5usdLqDYtZ4Xbvsmr6FDaoVLMFksTsvu0JQOAV5uWNeabuM4owwi3ze1zo2lxPEEflpEvlWIbKgYpfBsg==
- MS=ms53416391
- SPFv=spf1 a mx ip4:172.85.51.146 ip4:50.201.154.234 ip4:96.95.183.177 ip4:208.112.82.170 include:spf.protection.outlook.com include:servers.mcsv.net include:icpbounce.com include:_spfprod.ngpvan.com include:spf1.formassembly.com -all
- ZOOM_verify_KpChOZTqR4ymeO4MaDz41A
- google-site-verification=YFOFfk1-OnWBrmzpr4oNxNtKQLGsMDg62AHAqA5QODU
- adobe-idp-site-verification=27485637a1d8527e65ea5503263dbd3d1f577402076aa46f4e0d5c6dda558a8a
- sophos-domain-verification=418996c74f50b10f4774985f371a136d9fe483b91b274df7cf896f8f8470da04
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 massteacher.org
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits