Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
saybrook.edu
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-22 22:52:48 UTC · ↺ Refresh
MX Hostnames
- saybrook-edu.mail.protection.outlook.com
MX Priorities
- saybrook-edu.mail.protection.outlook.com: 0
A / AAAA Records
- 99.83.160.113 ↩ afc876ef827f8b6d6.awsglobalaccelerator.com
- 15.197.191.128 ↩ afc876ef827f8b6d6.awsglobalaccelerator.com
Mail Server IPs
- 52.101.194.15 ↩ mail-ch4pr21cu00107.inbound.protection.outlook.com
- 52.101.10.8 ↩ mail-bn1pr04cu00100.inbound.protection.outlook.com
- 52.101.11.13 ↩ mail-sn1pr0501cu00205.inbound.protection.outlook.com
- 52.101.41.54 ↩ mail-sj2pr05cu00506.inbound.protection.outlook.com
- 2a01:111:f403:c902::4 ↩ mail-sj0pr03cu01504.inbound.protection.outlook.com
- 2a01:111:f403:f901:: ↩ mail-mn2pr04cu00200.inbound.protection.outlook.com
- 2a01:111:f403:c946::3 ↩ mail-ch0pr04cu00603.inbound.protection.outlook.com
- 2a01:111:f403:f90d:: ↩ mail-sn1pr0501cu00200.inbound.protection.outlook.com
SOA Record
Raw SOA
ns-1329.awsdns-38.org awsdns-hostmaster.amazon.com 2025062503 7200 900 1209600 86400
Primary NS (mname)
ns-1329.awsdns-38.org
Admin Email (rname)
awsdns-hostmaster@amazon.com
Serial
2025062503
Refresh
7200s
Retry
900s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
ns-421.awsdns-52.com
ns-926.awsdns-51.net
ns-1329.awsdns-38.org
ns-1613.awsdns-09.co.uk
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com include:_spf1.saybrook.edu include:_spf2.saybrook.edu -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none;
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._domainkey
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
2 records- 0TH21IF75GNB1PIEDRU2FKBJNG8Z871NZ3WI1XN8E
- SPFv=spf1 include:spf.protection.outlook.com include:_spf1.saybrook.edu include:_spf2.saybrook.edu -all
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 saybrook.edu
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits