Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
capstonecpas.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-24 18:12:00 UTC · ↺ Refresh
MX Hostnames
- capstonecpas-com.mail.protection.outlook.com
MX Priorities
- capstonecpas-com.mail.protection.outlook.com: 0
A / AAAA Records
- 104.21.63.103 (no PTR)
- 172.67.170.141 (no PTR)
- 2606:4700:3031::6815:3f67
- 2606:4700:3034::ac43:aa8d
Mail Server IPs
- 52.101.42.14 ↩ mail-mw2pr04cu00106.inbound.protection.outlook.com
- 52.101.50.13 ↩ mail-mw2pr02cu00605.inbound.protection.outlook.com
- 52.101.41.0 ↩ mail-byapr05cu00400.inbound.protection.outlook.com
- 52.101.40.0 ↩ mail-cy5pr03cu00300.inbound.protection.outlook.com
- 2a01:111:f403:f805::1 ↩ mail-co1pr03cu00301.inbound.protection.outlook.com
- 2a01:111:f403:f909:: ↩ mail-bn6pr04cu00200.inbound.protection.outlook.com
- 2a01:111:f403:f802::1 ↩ mail-sj2pr05cu00101.inbound.protection.outlook.com
- 2a01:111:f403:c902::3 ↩ mail-sj0pr03cu01703.inbound.protection.outlook.com
SOA Record
Raw SOA
adam.ns.cloudflare.com dns.cloudflare.com 2398809136 10000 2400 604800 1800
Primary NS (mname)
adam.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2398809136
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
adam.ns.cloudflare.com
wally.ns.cloudflare.com
SPF Record
✓ Strict (-all)
v=spf1 mx include:spf.protection.outlook.com include:smtpcorp.com include:spf.myconnectwise.net include:sendgrid.net include:spf-westus.emailsignatures365.com -all
📊 DNS lookups: 6/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine;
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._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
5 records- po4vckevbtoulslmjkvos04cs4
- SPFv=spf1 mx include:spf.protection.outlook.com include:smtpcorp.com include:spf.myconnectwise.net include:sendgrid.net include:spf-westus.emailsignatures365.com -all
- MS=ms84553312
- google-site-verification=aSvgKGAGqYM4-G4sQkv0s3r42HngUBEGhG_O3LTsdh0
- logmein-verification-code=VGdutMwoUrXYnxJDMfcX2qVV3
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 capstonecpas.com
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits