rsieu.com

Valid Email Server
Domain Lookup › rsieu.com
Live data — DNS records and disposable check were just fetched and saved.

Domain Overview

DNS: ⚡ live Checker: ⚡ live
rsieu.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-09-04 18:14:49 UTC · ↺ Refresh

Add email validation to your forms — free

Add our free script to block 10,000+ disposable domains + perform other checks. No signup, unlimited checks.

MX validation Disposable detection Role accounts
Add to your signup form
<script src="https://check.verifyswift.com/"></script>
One line · No registration · See full docs & demo → · Customize →

MX Hostnames

  • rsieu-com.mail.protection.outlook.com

MX Priorities

  • rsieu-com.mail.protection.outlook.com: 0

A / AAAA Records

  • 104.21.67.188 (no PTR)
  • 172.67.179.124 (no PTR)
  • 2606:4700:3032::ac43:b37c
  • 2606:4700:3033::6815:43bc

Mail Server IPs

  • 52.101.103.39 ↩ mail-miypr05cu00207.inbound.protection.outlook.com
  • 52.101.73.123 ↩ mail-am6pr02cu00203.inbound.protection.outlook.com
  • 52.101.73.15 ↩ mail-am9pr04cu00107.inbound.protection.outlook.com
  • 52.101.68.12 ↩ mail-db9pr02cu00204.inbound.protection.outlook.com
  • 2a01:111:f403:ca09::7 ↩ mail-am9pr04cu00107.inbound.protection.outlook.com
  • 2a01:111:f403:ca04::5 ↩ mail-db3pr0202cu00205.inbound.protection.outlook.com
  • 2a01:111:f403:ca04::7 ↩ mail-db4pr02cu00307.inbound.protection.outlook.com
  • 2a01:111:f403:ca04::d ↩ mail-db6pr03cu00105.inbound.protection.outlook.com

SOA Record

Raw SOA sarah.ns.cloudflare.com dns.cloudflare.com 2411822745 10000 2400 604800 1800
Primary NS (mname)
sarah.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2411822745
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s

Nameservers (NS)

sarah.ns.cloudflare.com
stan.ns.cloudflare.com

SPF Record

✓ Strict (-all)
v=spf1 ip4:88.119.24.72 ip4:81.7.88.82 include:_spf.mlsend.com include:spf.sendinblue.com mx include:_spf.google.com include:spf.protection.outlook.com include:_spf.mail.hostinger.com -all
📊 DNS lookups: 6/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

~ Quarantine
v=DMARC1; p=quarantine; pct=100; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]

DKIM Selectors

✓ 2 found
google._domainkey
mail._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: google

Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses

All TXT Records

6 records
  • Foxit-domain-verification=ade881a666d06977bd435af85914620e
  • MS=ms81405545
  • atlassian-sending-domain-verification=ce5f3271-f4e3-42fa-a59f-8fe3a01ecb33
  • google-site-verification=1U6Twf2tvSX1Iou2TfrwlsSwSinCC4HDYD8EPGHlJSM
  • google-site-verification=fKgAAIWfRKQwT7lIeDqsvuq0x5m2Embt-H0IN5cCIDI
  • SPFv=spf1 ip4:88.119.24.72 ip4:81.7.88.82 include:_spf.mlsend.com include:spf.sendinblue.com mx include:_spf.google.com include:spf.protection.outlook.com include:_spf.mail.hostinger.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 rsieu.com

SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.

No credit card required
Get 1,000 Free Credits