Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
dm.duke.edu
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-04-01 03:09:18 UTC · ↺ Refresh
MX Hostnames
- dm-duke-edu.mail.protection.outlook.com
MX Priorities
- dm-duke-edu.mail.protection.outlook.com: 10
A / AAAA Records
No A/AAAA records found.
Mail Server IPs
- 52.101.8.34 ↩ mail-dm2pr04cu00102.inbound.protection.outlook.com
- 52.101.11.17 ↩ mail-sn1pr0501cu00301.inbound.protection.outlook.com
- 52.101.8.46 ↩ mail-dm6pr05cu00406.inbound.protection.outlook.com
- 52.101.10.6 ↩ mail-bn1pr21cu00106.inbound.protection.outlook.com
- 2a01:111:f403:f90f:: ↩ mail-sa9pr04cu00100.inbound.protection.outlook.com
- 2a01:111:f403:c946::3 ↩ mail-ch0pr04cu00603.inbound.protection.outlook.com
- 2a01:111:f403:c946::4 ↩ mail-ch0pr04cu00504.inbound.protection.outlook.com
- 2a01:111:f403:f804::2 ↩ mail-co1pr05cu00402.inbound.protection.outlook.com
SOA Record
Raw SOA
nameserver1.mc.duke.edu dh-hostmaster.duke.edu 788494346 1200 180 1209600 3600
Primary NS (mname)
nameserver1.mc.duke.edu
Admin Email (rname)
dh-hostmaster@duke.edu
Serial
788494346
Refresh
1200s
Retry
180s
Expire
1209600s
Minimum TTL
3600s
Nameservers (NS)
nameserver1.mc.duke.edu
nameserver2.mc.duke.edu
SPF Record
✓ Soft Fail (~all)
v=spf1 include:%{i}._ip.%{h}._ehlo.%{d}._spf.vali.email include:_spf.salesforce.com ~all
📊 DNS lookups: 2/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; rua=mailto:[email protected],mailto:[email protected]; ruf=mailto:[email protected]
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected],mailto:[email protected]
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._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
24 records- e2ma-verification=ej0fb
- e2ma-verification=gnegb
- e2ma-verification=hjbgb
- e2ma-verification=1bcfb
- e2ma-verification=oaxfb
- e2ma-verification=yc0fb
- iContact1588937
- e2ma-verification=2xagb
- e2ma-verification=55bgb
- e2ma-verification=a94fb
- e2ma-verification=884fb
- e2ma-verification=9y9eb
- e2ma-verification=4xyfb
- e2ma-verification=n0zfb
- e2ma-verification=0magb
- e2ma-verification=ngegb
- e2ma-verification=1magb
- SPFv=spf1 include:%{i}._ip.%{h}._ehlo.%{d}._spf.vali.email include:_spf.salesforce.com ~all
- sMlnRWJOuL4e+fbJdszILzVQKcUNLfYLda/GornRnLocQ8hhiTMP/8ulRyWDc4l/48q6V9g0FTs+ra1QVE5QFw==
- e2ma-verification=lu7fb
- e2ma-verification=vfofb
- e2ma-verification=e0zfb
- amazonses:I/YFzhw291lG9f9AZBbVkYH2WnwOnIbmqAIAGSRipac=
- e2ma-verification=lp0fb
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 dm.duke.edu
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits