Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
londonderry.org
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-20 00:27:07 UTC · ↺ Refresh
MX Hostnames
- londonderry-org.mail.protection.outlook.com
MX Priorities
- londonderry-org.mail.protection.outlook.com: 10
A / AAAA Records
- 50.206.70.107 (no PTR)
Mail Server IPs
- 52.101.9.2 ↩ mail-mn2pr02cu00202.inbound.protection.outlook.com
- 52.101.50.1 ↩ mail-co1pr05cu00401.inbound.protection.outlook.com
- 52.101.11.3 ↩ mail-sn1pr0501cu00103.inbound.protection.outlook.com
- 52.101.8.51 ↩ mail-dm1pr04cu00203.inbound.protection.outlook.com
- 2a01:111:f403:c901::1 ↩ mail-bl2pr04cu00201.inbound.protection.outlook.com
- 2a01:111:f403:c902::5 ↩ mail-sj2pr05cu00505.inbound.protection.outlook.com
- 2a01:111:f403:f907::1 ↩ mail-dm1pr04cu00201.inbound.protection.outlook.com
- 2a01:111:f403:c922::1 ↩ mail-bl0pr05cu00501.inbound.protection.outlook.com
SOA Record
Raw SOA
ns79.worldnic.com namehost.worldnic.com 126020614 10800 3600 604800 3600
Primary NS (mname)
ns79.worldnic.com
Admin Email (rname)
namehost@worldnic.com
Serial
126020614
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
ns80.worldnic.com
ns79.worldnic.com
SPF Record
✓ Strict (-all)
v=spf1 ip4:50.206.70.102 include:customerspf.schoolmessenger.com include:_spf.google.com include:spf.protection.outlook.com -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; ruf=mailto:[email protected]; fo=1;
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
DKIM Selectors
✓ 3 found
google._domainkey
selector1._domainkey
selector2._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: google
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
6 records- sophos-domain-verification=56bab1e84779a39850dcd32af6213a141090b54e
- SPFv=spf1 ip4:50.206.70.102 include:customerspf.schoolmessenger.com include:_spf.google.com include:spf.protection.outlook.com -all
- adobe-idp-site-verification=52b5670cc60a32afbe51852b4d4846703c2fae302a8c59b18022c7025e258593
- HzqFdczHprefPoXB9DZOKj5ce+JvxHQ8r3UcytBoGKIOzHVoMYl9V71SieQ9t36Snzv1Srwj0tkUQr5dqfj1lA==
- MS=465A20E69EC983A51AB15B764B2F16D12069A101
- apple-domain-verification=yNmGsTdtu78zEeVk
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 londonderry.org
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits