Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
hopperinstitute.com
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-19 23:09:44 UTC · ↺ Refresh
MX Hostnames
- mailsec.protonmail.ch
- mail.protonmail.ch
MX Priorities
- mail.protonmail.ch: 10
- mailsec.protonmail.ch: 20
A / AAAA Records
- 198.49.23.144 (no PTR)
- 198.49.23.145 (no PTR)
- 198.185.159.145 (no PTR)
- 198.185.159.144 (no PTR)
Mail Server IPs
- 185.205.70.128 ↩ mail.protonmail.ch
- 176.119.200.128 ↩ mail.protonmail.ch
- 185.70.42.128 ↩ mail.protonmail.ch
- 176.119.200.129 ↩ mailsec.protonmail.ch
- 185.205.70.129 ↩ mailsec.protonmail.ch
- 185.70.42.129 ↩ mailsec.protonmail.ch
SOA Record
Raw SOA
ns-cloud-d1.googledomains.com cloud-dns-hostmaster.google.com 1 21600 3600 259200 300
Primary NS (mname)
ns-cloud-d1.googledomains.com
Admin Email (rname)
cloud-dns-hostmaster@google.com
Serial
1
Refresh
21600s
Retry
3600s
Expire
259200s
Minimum TTL
300s
Nameservers (NS)
ns-cloud-d3.googledomains.com
ns-cloud-d4.googledomains.com
ns-cloud-d1.googledomains.com
ns-cloud-d2.googledomains.com
SPF Record
✓ Soft Fail (~all)
v=spf1 include:_spf.protonmail.ch mx~all
📊 DNS lookups: 2/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
~ Quarantine
v=DMARC1;p=quarantine
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
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
2 records- protonmail-verification=c1434842e60a93dd4dc07ca00390ec45110ee8fc
- SPFv=spf1 include:_spf.protonmail.ch mx~all
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