Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
ustoa.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-27 03:44:33 UTC · ↺ Refresh
MX Hostnames
- ustoa-com.mail.protection.outlook.com
MX Priorities
- ustoa-com.mail.protection.outlook.com: 0
A / AAAA Records
- 18.225.156.103 ↩ ec2-18-225-156-103.us-east-2.compute.amazonaws.com
Mail Server IPs
- 52.101.41.26 ↩ mail-sj0pr03cu01702.inbound.protection.outlook.com
- 52.101.10.10 ↩ mail-bn8pr05cu00102.inbound.protection.outlook.com
- 52.101.10.18 ↩ mail-bn8pr05cu00302.inbound.protection.outlook.com
- 52.101.10.14 ↩ mail-bn6pr04cu00206.inbound.protection.outlook.com
- 2a01:111:f403:c936:: ↩ mail-cy1pr05cu00400.inbound.protection.outlook.com
- 2a01:111:f403:c946:: ↩ mail-ch5pr02cu00200.inbound.protection.outlook.com
- 2a01:111:f403:f901::1 ↩ mail-bl0pr02cu00601.inbound.protection.outlook.com
- 2a01:111:f403:f802:: ↩ mail-byapr05cu00400.inbound.protection.outlook.com
SOA Record
Raw SOA
nena.ns.cloudflare.com dns.cloudflare.com 2398697826 10000 2400 604800 1800
Primary NS (mname)
nena.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2398697826
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
nena.ns.cloudflare.com
newt.ns.cloudflare.com
SPF Record
✓ Soft Fail (~all)
v=spf1 include:_spf.ustoa_com._d.easydmarc.pro ~all
📊 DNS lookups: 1/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✗ p=none
v=DMARC1;p=none;rua=mailto:[email protected],mailto:[email protected],mailto:[email protected];ruf=mailto:[email protected];fo=1;
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected],mailto:[email protected],mailto:[email protected]
DKIM Selectors
✓ 4 found
selector1._domainkey
selector2._domainkey
s1._domainkey
s2._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
8 records- gtpgpxr4wz8lj9v33rv4tnr3hh7pnps4
- k3t6pcxkv3f6qznynyrdsxxgd16zlj1p
- s8w4ldc891zy6l44t8bh834xcymzwfgf
- SPFv=spf1 include:_spf.ustoa_com._d.easydmarc.pro ~all
- 19lhsvbtl6fv0h0m585w24fs85s4qj5k
- MS=ms31693832
- _iruqwtwhbjo80xyjpvmmjh3fqsal4k6
- google-site-verification=WOepSq5HXT4KhPvSMTRgfl-wLjIW1QLILfi9y9T9dwA
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 ustoa.com
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits