Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
duvalschools.org
Yes
✓ Yes
Mimecast
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-23 13:27:23 UTC · ↺ Refresh
MX Hostnames
- usb-smtp-inbound-1.mimecast.com
- usb-smtp-inbound-2.mimecast.com
MX Priorities
- usb-smtp-inbound-2.mimecast.com: 10
- usb-smtp-inbound-1.mimecast.com: 10
A / AAAA Records
- 34.238.178.141 ↩ ec2-34-238-178-141.compute-1.amazonaws.com
Mail Server IPs
- 170.10.152.242 ↩ usb-smtp-delivery-2.mimecast.com
- 170.10.150.242 ↩ usb-smtp-delivery-2.mimecast.com
SOA Record
Raw SOA
dns1.duval.k12.fl.us hostmaster.duvalschools.org 20102254 1200 300 1814400 3600
Primary NS (mname)
dns1.duval.k12.fl.us
Admin Email (rname)
hostmaster@duvalschools.org
Serial
20102254
Refresh
1200s
Retry
300s
Expire
1814400s
Minimum TTL
3600s
Nameservers (NS)
dns2.duval.k12.fl.us
ns2.mfn2.myflorida.com
ns3.mfn2.myflorida.com
dns1.duval.k12.fl.us
ns1.mfn2.myflorida.com
SPF Record
✓ Soft Fail (~all)
v=spf1 include:%{i}._ip.%{h}._ehlo.%{d}._spf.vali.email ~all
📊 DNS lookups: 1/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected],mailto:[email protected]; rf=afrf; ri=86400
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected],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
12 records- mvw7c8pbhksgxv1mdddsgznjf2q67stj
- _gm2scfz98g7buj1j4ailf7s9bxh5f02
- _8uh56vn5inillfef2oy9y7oijrrns5n
- DvC1C315RFwNzR05vhaxDV02pU0hY6I+tahmzyQb/KVjFTIQ/383k87Ex1iWn1bRr7Q8lEY4G9TP9DGRVduMmA==
- logmein-verification-code=c66ed52c-fb28-4ac6-93f5-9eb2accfb209
- adobe-idp-site-verification=7641331191ee094509af2da7d61aed440cabb3a8c759ae99435520637ad8acb3
- docusign=062aea39-b699-4689-a4b7-99951eb7cc64
- r8nyx76d5ff1cbcrx99wg8g2my05cw8r
- SPFv=spf1 include:%{i}._ip.%{h}._ehlo.%{d}._spf.vali.email ~all
- apple-domain-verification=B1WYooI7DYOO6Pbg
- MS=ms90189724
- 66d94efd9a01a395ae290c47d64b5bfb
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