Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
houstonarboretum.org
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-19 00:52:11 UTC · ↺ Refresh
MX Hostnames
- houstonarboretum-org.mail.protection.outlook.com
MX Priorities
- houstonarboretum-org.mail.protection.outlook.com: 0
A / AAAA Records
- 172.67.137.26 (no PTR)
- 104.21.38.175 (no PTR)
- 2606:4700:3030::ac43:891a
- 2606:4700:3030::6815:26af
Mail Server IPs
- 52.101.194.3 ↩ mail-ch1pr04cu00103.inbound.protection.outlook.com
- 52.101.8.42 ↩ mail-dm6pr03cu00402.inbound.protection.outlook.com
- 52.101.41.0 ↩ mail-byapr05cu00400.inbound.protection.outlook.com
- 52.101.194.0 ↩ mail-ch5pr02cu00200.inbound.protection.outlook.com
- 2a01:111:f403:f908::1 ↩ mail-bn1pr04cu00101.inbound.protection.outlook.com
- 2a01:111:f403:f903:: (no PTR)
- 2a01:111:f403:c922:: ↩ mail-bl0pr03cu00200.inbound.protection.outlook.com
- 2a01:111:f403:c927::1 ↩ mail-bn8pr05cu00301.inbound.protection.outlook.com
SOA Record
Raw SOA
abdullah.ns.cloudflare.com dns.cloudflare.com 2399198595 10000 2400 604800 1800
Primary NS (mname)
abdullah.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2399198595
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
abdullah.ns.cloudflare.com
tia.ns.cloudflare.com
SPF Record
✓ Soft Fail (~all)
v=spf1 include:_spf.createsend.com include:spf.protection.outlook.com -all
v=spf1 include:_spf.agiletix.com ~all
📊 DNS lookups: 3/10
~ Soft fail (~all) — moderate 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
✓ 4 found
selector1._domainkey
selector2._domainkey
s1._domainkey
s2._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
3 records- MS=ms38736293
- sf7jqd9sjd2u7r8adtcb5437v8
- SPFv=spf1 include:_spf.createsend.com include:spf.protection.outlook.com -all v=spf1 include:_spf.agiletix.com ~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 houstonarboretum.org
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits