b4b.ventures

Valid Email Server
Domain Lookup › b4b.ventures

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
b4b.ventures
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-03-20 16:09:06 UTC · ↺ Refresh

MX Hostnames

  • b4b-ventures.mail.protection.outlook.com

MX Priorities

  • b4b-ventures.mail.protection.outlook.com: 1

A / AAAA Records

  • 54.152.238.171 ↩ ec2-54-152-238-171.compute-1.amazonaws.com

Mail Server IPs

  • 52.101.10.6 ↩ mail-bn1pr21cu00106.inbound.protection.outlook.com
  • 52.101.194.19 ↩ mail-ch5pr02cu00303.inbound.protection.outlook.com
  • 52.101.9.0 ↩ mail-bl2pr02cu00100.inbound.protection.outlook.com
  • 52.101.8.51 ↩ mail-dm1pr04cu00203.inbound.protection.outlook.com
  • 2a01:111:f403:f907::1 ↩ mail-dm1pr04cu00201.inbound.protection.outlook.com
  • 2a01:111:f403:f909:: ↩ mail-bn6pr04cu00200.inbound.protection.outlook.com
  • 2a01:111:f403:c902:: ↩ mail-sj2pr05cu00300.inbound.protection.outlook.com
  • 2a01:111:f403:f902:: ↩ mail-bl2pr04cu00100.inbound.protection.outlook.com

SOA Record

Raw SOA ns-115.awsdns-14.com awsdns-hostmaster.amazon.com 1 7200 900 1209600 86400
Primary NS (mname)
ns-115.awsdns-14.com
Admin Email (rname)
awsdns-hostmaster@amazon.com
Serial
1
Refresh
7200s
Retry
900s
Expire
1209600s
Minimum TTL
86400s

Nameservers (NS)

ns-706.awsdns-24.net
ns-115.awsdns-14.com
ns-1156.awsdns-16.org
ns-1932.awsdns-49.co.uk

SPF Record

✓ Soft Fail (~all)
v=spf1 include:spf.protection.outlook.com include:sendgrid.net ~all
📊 DNS lookups: 2/10
~ Soft fail (~all) — moderate enforcement

DMARC Record

✗ Missing

No DMARC record — emails cannot be rejected on auth failure.

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

2 records
  • google-site-verification=4ZRiGV3_0rR6TKgotk5N7j6phNzUuJ7YjUaDx6O2NPk
  • SPFv=spf1 include:spf.protection.outlook.com include:sendgrid.net ~all
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