Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
atus.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-21 03:14:20 UTC · ↺ Refresh
MX Hostnames
- atus-com.mail.protection.outlook.com
MX Priorities
- atus-com.mail.protection.outlook.com: 0
A / AAAA Records
No A/AAAA records found.
Mail Server IPs
- 52.101.194.17 ↩ mail-ch5pr02cu00401.inbound.protection.outlook.com
- 40.93.192.4 ↩ mail-dm2pr04cu00404.inbound.protection.outlook.com
- 52.101.194.13 ↩ mail-ch0pr04cu00605.inbound.protection.outlook.com
- 52.101.40.2 ↩ mail-cy1pr05cu00402.inbound.protection.outlook.com
- 2a01:111:f403:c91d:: ↩ mail-mw2pr04cu00100.inbound.protection.outlook.com
- 2a01:111:f403:f910:: ↩ mail-cy5pr03cu00300.inbound.protection.outlook.com
- 2a01:111:f403:c803:: ↩ mail-bn1pr21cu00200.inbound.protection.outlook.com
- 2a01:111:f403:c902::16 ↩ mail-byapr04cu00306.inbound.protection.outlook.com
SOA Record
Raw SOA
anahi.ns.cloudflare.com dns.cloudflare.com 2398044620 10000 2400 604800 1800
Primary NS (mname)
anahi.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2398044620
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
armando.ns.cloudflare.com
anahi.ns.cloudflare.com
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com include:_spf1-meo.microsoft.com include:sendgrid.net include:_spf.psm.knowbe4.com include:_spf.cmail.ondemand.com include:_spf.cloudmail.net.sap include:amazonses.com include:21028114.spf02.hubspotemail.net ip4:12.9.204.8/29 ip4:108.169.181.112/28 ip4:208.101.254.78 -all
📊 DNS lookups: 8/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; sp=reject; aspf=s; adkim=s; rua=mailto:[email protected];
✓ Reject — strongest protection
📋 SPF alignment: Strict
· DKIM alignment: Strict
📧 Reports → mailto:[email protected]
↳ Subdomain policy: reject
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
4 records- MS=ms76521519
- ORMYJLEKS
- ZfV0LYZK1HR+fglCfWjmU6Yfrw5EjUy5vUJ4i16drsu+t+t1/x1Nwhl5BB68XXyc3I+CAPJPsiQo2v7cearn5Q==
- SPFv=spf1 include:spf.protection.outlook.com include:_spf1-meo.microsoft.com include:sendgrid.net include:_spf.psm.knowbe4.com include:_spf.cmail.ondemand.com include:_spf.cloudmail.net.sap include:amazonses.com include:21028114.spf02.hubspotemail.net ip4:12.9.204.8/29 ip4:108.169.181.112/28 ip4:208.101.254.78 -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 atus.com
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits