Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
cui.edu
Yes
✓ Yes
Mimecast
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-18 05:58:12 UTC · ↺ Refresh
MX Hostnames
- us-smtp-inbound-2.mimecast.com
- us-smtp-inbound-1.mimecast.com
MX Priorities
- us-smtp-inbound-1.mimecast.com: 10
- us-smtp-inbound-2.mimecast.com: 10
A / AAAA Records
- 104.26.6.166 (no PTR)
- 104.26.7.166 (no PTR)
- 172.67.73.196 (no PTR)
- 2606:4700:20::681a:7a6 (no PTR)
- 2606:4700:20::681a:6a6
- 2606:4700:20::ac43:49c4
Mail Server IPs
- 170.10.132.141 ↩ us-smtp-inbound-2.mimecast.com
- 170.10.128.242 ↩ us-smtp-inbound-1.mimecast.com
- 170.10.128.221 ↩ us-smtp-inbound-1.mimecast.com
- 170.10.132.242 ↩ us-smtp-inbound-1.mimecast.com
- 170.10.132.221 ↩ us-smtp-inbound-2.mimecast.com
- 170.10.128.141 ↩ us-smtp-inbound-2.mimecast.com
SOA Record
Raw SOA
may.ns.cloudflare.com dns.cloudflare.com 2398207941 10000 2400 604800 1800
Primary NS (mname)
may.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2398207941
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
may.ns.cloudflare.com
seth.ns.cloudflare.com
SPF Record
✓ Soft Fail (~all)
v=spf1 ip4:66.210.50.0/24 ip4:70.167.155.40/29 include:_spf.google.com include:us._netblocks.mimecast.com include:sendgrid.net include:mailgun.org include:_spf-ext.cui.edu ~all
📊 DNS lookups: 5/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; sp=none; adkim=r; aspf=r; pct=1; fo=1; rf=afrf; ri=86400; rua=mailto:[email protected],mailto:[email protected]; ruf=mailto:[email protected],mailto:[email protected];
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected],mailto:[email protected]
↳ Subdomain policy: none
⚠ Policy applies to 1% of failing messages only
DKIM Selectors
✓ 3 found
mail._domainkey
s1._domainkey
s2._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: mail
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
3 records- SPFv=spf1 ip4:66.210.50.0/24 ip4:70.167.155.40/29 include:_spf.google.com include:us._netblocks.mimecast.com include:sendgrid.net include:mailgun.org include:_spf-ext.cui.edu ~all
- _slgs4pz3wzxrkldvozz64wep55749zw
- brevo-code:ec3a8e44c74999199f35401ac7f35a95
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