Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
detroitpubliclibrary.org
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-25 19:52:53 UTC · ↺ Refresh
MX Hostnames
- detroitpubliclibrary-org.mail.protection.outlook.com
MX Priorities
- detroitpubliclibrary-org.mail.protection.outlook.com: 10
A / AAAA Records
- 104.237.128.75 ↩ 104-237-128-75.ip.linodeusercontent.com
Mail Server IPs
- 52.101.10.2 ↩ mail-bn8pr03cu00202.inbound.protection.outlook.com
- 52.101.11.13 ↩ mail-sn1pr0501cu00205.inbound.protection.outlook.com
- 52.101.41.180 ↩ mail-byapr04cu00204.inbound.protection.outlook.com
- 52.101.9.11 ↩ mail-bl2pr04cu00103.inbound.protection.outlook.com
- 2a01:111:f403:c922::1 ↩ mail-bl0pr05cu00501.inbound.protection.outlook.com
- 2a01:111:f403:f912:: ↩ mail-cy5pr03cu00200.inbound.protection.outlook.com
- 2a01:111:f403:c931:: ↩ mail-sn1pr02cu00100.inbound.protection.outlook.com
- 2a01:111:f403:c902::6 ↩ mail-sj0pr21cu00106.inbound.protection.outlook.com
SOA Record
Raw SOA
dns.merit.net libsupport.merit.edu 2026030201 28800 14400 2419200 14400
Primary NS (mname)
dns.merit.net
Admin Email (rname)
libsupport@merit.edu
Serial
2026030201
Refresh
28800s
Retry
14400s
Expire
2419200s
Minimum TTL
14400s
Nameservers (NS)
dns3.merit.net
dns1.merit.net
dns2.merit.net
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com include:spf.happyfox.com -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1; pct=25
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
⚠ Policy applies to 25% of failing messages only
DKIM Selectors
✓ 3 found
selector1._domainkey
selector2._domainkey
k1._domainkey
✓ Public key: 392 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
3 records- MS=ms11367945
- google-site-verification=K0v9pxhovLS_CGYhmWqDqwUrjY7FdC0wQuEGJK1t0R0
- SPFv=spf1 include:spf.protection.outlook.com include:spf.happyfox.com -all
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