Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
redbitdev.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-19 05:35:49 UTC · ↺ Refresh
MX Hostnames
- redbitdev-com.mail.protection.outlook.com
MX Priorities
- redbitdev-com.mail.protection.outlook.com: 0
A / AAAA Records
- 198.202.211.1 (no PTR)
Mail Server IPs
- 52.101.192.0 ↩ mail-yqzpr01cu00900.inbound.protection.outlook.com
- 52.101.190.0 ↩ mail-yt5pr01cu00100.inbound.protection.outlook.com
- 52.101.192.1 ↩ mail-yqzpr01cu01001.inbound.protection.outlook.com
- 52.101.190.3 ↩ mail-yt6pr01cu00103.inbound.protection.outlook.com
- 2a01:111:f403:c942::3 ↩ mail-yt6pr01cu00103.inbound.protection.outlook.com
- 2a01:111:f403:c944:: ↩ mail-yqzpr01cu00900.inbound.protection.outlook.com
- 2a01:111:f403:c944::1 ↩ mail-yqzpr01cu01001.inbound.protection.outlook.com
- 2a01:111:f403:c942::1 ↩ mail-yt3pr01cu00701.inbound.protection.outlook.com
SOA Record
Raw SOA
dns1.registrar-servers.com hostmaster.registrar-servers.com 1773093779 43200 3600 604800 3601
Primary NS (mname)
dns1.registrar-servers.com
Admin Email (rname)
hostmaster@registrar-servers.com
Serial
1773093779
Refresh
43200s
Retry
3600s
Expire
604800s
Minimum TTL
3601s
Nameservers (NS)
dns2.registrar-servers.com
dns1.registrar-servers.com
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com include:servers.mcsv.net include:spf-ca.emailsignatures365.com -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; adkim=r; aspf=r; rua=mailto:[email protected];
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 5 found
selector1._domainkey
selector2._domainkey
k1._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
7 records- d365mktkey=3df3vkdccr0qfkocmeluhxpp7
- anthropic-domain-verification-kjsgp4=KznMYUZD7IeAG5GyE2a1yujkK
- google-site-verification=wYRrOPhN4XaO_ymgvQ-XRsdM6jG1HEKmvV3iuRPAIwU
- apple-domain-verification=owg52njaSx6gs7RiwpJo_X3jmKhAbn2bLBXmwJ8D67k
- SPFv=spf1 include:spf.protection.outlook.com include:servers.mcsv.net include:spf-ca.emailsignatures365.com -all
- k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDRthWno5i9URBLvlyhn7paV527EAGwrjTfdXnYx4myPzMcQrS1r8TkPQyYHc4RmzO979nvJ6JCXdEjqlHl7V+edxpcXHcrihOkt/fX2x3aL+zFwrp9Q9XUX7hqcbjUaS5c1Y4dxdaV3OtEcp6gpw4xQTLIJ6iTqnuf4cV1jDaseQIDAQAB
- MS=ms64676781
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 redbitdev.com
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits