Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
mdu.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-30 04:54:56 UTC · ↺ Refresh
MX Hostnames
- mdu-com.mail.protection.outlook.com
MX Priorities
- mdu-com.mail.protection.outlook.com: 0
A / AAAA Records
- 104.16.239.109 (no PTR)
- 104.16.238.109 (no PTR)
- 2606:4700::6810:ee6d
- 2606:4700::6810:ef6d
Mail Server IPs
- 52.101.10.5 ↩ mail-bn6pr04cu00105.inbound.protection.outlook.com
- 52.101.50.10 ↩ mail-mw2pr02cu00502.inbound.protection.outlook.com
- 52.101.194.0 ↩ mail-ch5pr02cu00200.inbound.protection.outlook.com
- 52.101.50.7 ↩ mail-co1pr21cu00207.inbound.protection.outlook.com
- 2a01:111:f403:c922::1 ↩ mail-bl0pr05cu00501.inbound.protection.outlook.com
- 2a01:111:f403:c902::16 ↩ mail-byapr04cu00306.inbound.protection.outlook.com
- 2a01:111:f403:f90d::1 ↩ mail-sn1pr0501cu00301.inbound.protection.outlook.com
- 2a01:111:f403:c931:: ↩ mail-sn1pr02cu00100.inbound.protection.outlook.com
SOA Record
Raw SOA
lina.ns.cloudflare.com dns.cloudflare.com 2399409431 10000 2400 604800 1800
Primary NS (mname)
lina.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2399409431
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
nile.ns.cloudflare.com
lina.ns.cloudflare.com
SPF Record
✓ Strict (-all)
v=spf1 mx a ip4:162.57.254.56 ip4:66.97.254.237 ip4:162.57.239.252 ip4:168.245.78.111 include:spf.smtp2go.com include:sendgrid.net include:spf.protection.outlook.com -all
📊 DNS lookups: 5/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected];
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
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
9 records- t269usguke15d1giqls16lvsrr
- t7mo34nb22lpsqprrbcoocvrct
- SPFv=spf1 mx a ip4:162.57.254.56 ip4:66.97.254.237 ip4:162.57.239.252 ip4:168.245.78.111 include:spf.smtp2go.com include:sendgrid.net include:spf.protection.outlook.com -all
- 3M/dgaiVLdeuF/MuSrkPTIfK6KYMebeZST1y2hETwePdSwxp0ocpIBORGHWFVzSCByC94ZAcJvAV7hF3e6/CGQ==
- 6u740ngess86j12tk725jutols
- MS=ms59222784
- OGmSP3FlDim3qvYVmal7lRuVAU6VWkZ0vzGWYhbpmOIOPRWKGkA4bsYLBQ8OO858xmZJ8drMztdLtJWrf1N79w==
- o4d5uerjk6nv2d8nd23h60fr9f
- qn6ab7906vq9754di1i423s4ee
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