Domain Overview
DNS: ✓ 1d ago
Checker: ✓ 1d ago
sissoninc.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-10-03 13:40:19 UTC · ↺ Refresh
MX Hostnames
- sissoninc-com.mail.protection.outlook.com
MX Priorities
- sissoninc-com.mail.protection.outlook.com: 0
A / AAAA Records
- 204.153.47.137 (no PTR)
Mail Server IPs
- 52.101.9.87 ↩ mail-bl2pr02cu00507.inbound.protection.outlook.com
- 52.101.10.2 ↩ mail-bn8pr03cu00202.inbound.protection.outlook.com
- 52.101.41.21 ↩ mail-sj2pr05cu00305.inbound.protection.outlook.com
- 52.101.40.56 ↩ mail-cy7pr05cu00100.inbound.protection.outlook.com
- 2a01:111:f403:c922::6 ↩ mail-bl2pr02cu00506.inbound.protection.outlook.com
- 2a01:111:f403:f90a::4 ↩ mail-bnypr04cu00104.inbound.protection.outlook.com
- 2a01:111:f403:f90d::1 ↩ mail-sn1pr0501cu00301.inbound.protection.outlook.com
- 2a01:111:f403:f903::3 ↩ mail-mn0pr04cu00203.inbound.protection.outlook.com
SOA Record
Raw SOA
michelle.ns.cloudflare.com dns.cloudflare.com 2415920707 10000 2400 604800 1800
Primary NS (mname)
michelle.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2415920707
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
ryan.ns.cloudflare.com
michelle.ns.cloudflare.com
SPF Record
✓ Soft Fail (~all)
v=spf1 a mx include:server343.smtp-spf.sureserver.com include:spf.protection.outlook.com ~all
📊 DNS lookups: 4/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; pct=100; rua=mailto:[email protected]; sp=none; aspf=r;
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: none
DKIM Selectors
✓ 1 found
dkim._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: dkim
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
2 records- MS=ms22287136
- SPFv=spf1 a mx include:server343.smtp-spf.sureserver.com include:spf.protection.outlook.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 · Customize →
See demo & docs
Deep verification
Full email verification for sissoninc.com
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits