Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
highline.edu
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-27 22:09:50 UTC · ↺ Refresh
MX Hostnames
- highline-edu.mail.protection.outlook.com
MX Priorities
- highline-edu.mail.protection.outlook.com: 10
A / AAAA Records
- 52.73.2.219 ↩ ec2-52-73-2-219.compute-1.amazonaws.com
- 34.236.193.193 ↩ ec2-34-236-193-193.compute-1.amazonaws.com
- 3.209.26.193
Mail Server IPs
- 52.101.9.2 ↩ mail-mn2pr02cu00202.inbound.protection.outlook.com
- 52.101.11.17 ↩ mail-sn1pr0501cu00301.inbound.protection.outlook.com
- 52.101.9.24 ↩ mail-bl2pr02cu00400.inbound.protection.outlook.com
- 40.93.192.1 ↩ mail-dm5pr02cu00201.inbound.protection.outlook.com
- 2a01:111:f403:c92c::3 ↩ mail-dm5pr04cu00103.inbound.protection.outlook.com
- 2a01:111:f403:c946::7 ↩ mail-ch5pr02cu00307.inbound.protection.outlook.com
- 2a01:111:f403:c902::5 ↩ mail-sj2pr05cu00505.inbound.protection.outlook.com
- 2a01:111:f403:f908:: ↩ mail-bn1pr21cu00100.inbound.protection.outlook.com
SOA Record
Raw SOA
mst3k.highline.edu helpdesk.highline.edu 2011092402 10800 3600 2592000 900
Primary NS (mname)
mst3k.highline.edu
Admin Email (rname)
helpdesk@highline.edu
Serial
2011092402
Refresh
10800s
Retry
3600s
Expire
2592000s
Minimum TTL
900s
Nameservers (NS)
aws-dns2.highline.edu
aws-dns1.highline.edu
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com include:lists.ctc.edu include:spf.outreachsystems.com include:sendgrid.net include:amazonses.com include:spf-na.exlibrisgroup.com include:us._netblocks.mimecast.com include:mbssmtp.mbsbooks.com ip4:74.122.104.0/22 ip4:20.236.219.18 ip4:168.156.71.192 ip4:168.156.71.191 ip4:168.156.71.190 ip4:52.33.95.27 ip4:168.156.11.35 ip4:168.156.67.45 ip4:168.156.68.28 ip4:203.31.38.183 -all
📊 DNS lookups: 8/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1;p=quarantine;sp=none;rua=mailto:[email protected]
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: none
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._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
10 records- apple-domain-verification=z2CYGweFk1RydrKr
- rhino_accounts=65bbb3fa8639c3fb34ab5e75094772c9
- workplace-domain-verification=zoeOhkpU9byqJGdtweFi8dQNOXtMaM
- amazonses:PJNWGpudl10Q93anDSF2oZeqo0codKjGAH8qt4bcI+A=
- atlassian-domain-verification=axREOXkRw0jyszKFykC3NN3ECYpdRtyIHSu4ny1Czj3OAsB8okJsiSuJNMzeDgHs
- SPFv=spf1 include:spf.protection.outlook.com include:lists.ctc.edu include:spf.outreachsystems.com include:sendgrid.net include:amazonses.com include:spf-na.exlibrisgroup.com include:us._netblocks.mimecast.com include:mbssmtp.mbsbooks.com ip4:74.122.104.0/22 ip4:20.236.219.18 ip4:168.156.71.192 ip4:168.156.71.191 ip4:168.156.71.190 ip4:52.33.95.27 ip4:168.156.11.35 ip4:168.156.67.45 ip4:168.156.68.28 ip4:203.31.38.183 -all
- google-site-verification=wA-x0wFPR0fzKJE2PqMhd0q29tCtl1r8_ObllPu3WRI
- amazonses:pUhia99G4wupnEAWWYJLEgL6R8FLeJWsVr9ceRuy1x0=
- ZOOM_verify_GMJ9VYM6SUWh4F2jGXKE9g
- adobe-idp-site-verification=dc68f93e1c334ddd1b1e5787f024524e24db45b2f07e0da3d2799d29d4c4a464
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 highline.edu
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits