Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
denverlibrary.org
Yes
✓ Yes
Google
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-23 14:24:24 UTC · ↺ Refresh
MX Hostnames
- alt2.aspmx.l.google.com
- aspmx.l.google.com
- alt1.aspmx.l.google.com
- aspmx2.googlemail.com
- aspmx3.googlemail.com
MX Priorities
- aspmx.l.google.com: 10
- alt1.aspmx.l.google.com: 20
- alt2.aspmx.l.google.com: 20
- aspmx2.googlemail.com: 30
- aspmx3.googlemail.com: 30
A / AAAA Records
- 209.236.108.107 (no PTR)
Mail Server IPs
- 142.251.111.27 ↩ bk-in-f27.1e100.net
- 2607:f8b0:4004:c06::1a ↩ bg-in-f26.1e100.net
- 108.177.123.27 ↩ lcscld-in-f27.1e100.net
- 2800:3f0:4003:c0f::1a (no PTR)
- 172.253.116.27 ↩ dj-in-f27.1e100.net
- 2a00:1450:400b:c02::1a ↩ dj-in-f26.1e100.net
- 108.177.123.26 ↩ lcscld-in-f26.1e100.net
- 2800:3f0:4003:c0f::1b (no PTR)
- 172.253.116.26 ↩ dj-in-f26.1e100.net
SOA Record
Raw SOA
ns-1848.awsdns-39.co.uk awsdns-hostmaster.amazon.com 1 7200 900 1209600 86400
Primary NS (mname)
ns-1848.awsdns-39.co.uk
Admin Email (rname)
awsdns-hostmaster@amazon.com
Serial
1
Refresh
7200s
Retry
900s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
ns-720.awsdns-26.net
ns-1113.awsdns-11.org
ns-1848.awsdns-39.co.uk
ns-423.awsdns-52.com
SPF Record
✓ Strict (-all)
v=spf1 ip4:209.236.108.101 ip4:97.107.141.21 ip4:35.80.141.6 ip4:44.229.121.55 ip4:148.59.100.16/28 include:_spf.alchemer.com include:_spf.google.com include:spf.protection.outlook.com include:_spf.mailgun.org -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected],mailto:[email protected]; aspf=r;
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected],mailto:[email protected]
DKIM Selectors
✓ 1 found
k1._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: k1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
3 records- google-site-verification=vUlWOvZoBSgbtq1pD9iF_FSI8C3cpMBRHCEfxDltlHY
- SPFv=spf1 ip4:209.236.108.101 ip4:97.107.141.21 ip4:35.80.141.6 ip4:44.229.121.55 ip4:148.59.100.16/28 include:_spf.alchemer.com include:_spf.google.com include:spf.protection.outlook.com include:_spf.mailgun.org -all
- canva-site-verification=tpohAGXdTdYfmfoznNjUqg
Full email verification for denverlibrary.org
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