Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
poloclub.net
Yes
✓ Yes
Mimecast
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-30 01:13:48 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
- 172.67.70.141 (no PTR)
- 104.26.13.214 (no PTR)
- 104.26.12.214 (no PTR)
- 2606:4700:20::681a:cd6 (no PTR)
- 2606:4700:20::ac43:468d (no PTR)
- 2606:4700:20::681a:dd6 (no PTR)
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
karina.ns.cloudflare.com dns.cloudflare.com 2398721153 10000 2400 604800 1800
Primary NS (mname)
karina.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2398721153
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
scott.ns.cloudflare.com
karina.ns.cloudflare.com
SPF Record
✓ Strict (-all)
v=spf1 include:_u.poloclub.net._spf.dmarcld.com -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected]; ruf=mailto:[email protected]; sp=quarantine; fo=1;
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: quarantine
DKIM Selectors
✗ None detectedNo DKIM records found for common selectors — your provider may use a custom selector name.
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
3 records- amazon-business-verification=a24dcd163470d37242de2825bad80b6466bc7f60325128c21920b7d1303e0eb2
- apple-domain-verification=2l2jVwV8uJBhZgCD
- SPFv=spf1 include:_u.poloclub.net._spf.dmarcld.com -all
Full email verification for poloclub.net
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
SPF / DKIM / DMARC Get 1,000 Free Credits