Rank #4,674Updated November 10, 2026
fourmilab.ch
Fourmilab
The site runs on HSTS, Nginx. Its email security grade is F. Its SSL certificate is issued by Let's Encrypt and is valid for 79 more days.
- Domain age
- —
- Technologies
- 2
- Email security
- F
- SSL days left
- 79
DNS records
| Type | Value | TTL |
|---|---|---|
| A | 52.28.236.0 | 81885 |
| MX | aspmx.l.google.com 1 | 86400 |
| MX | alt3.aspmx.l.google.com 10 | 86400 |
| MX | alt4.aspmx.l.google.com 10 | 86400 |
| MX | alt1.aspmx.l.google.com 5 | 86400 |
| MX | alt2.aspmx.l.google.com 5 | 86400 |
| NS | ns-1463.awsdns-54.org | 172800 |
| NS | ns-1903.awsdns-45.co.uk | 172800 |
| NS | ns-209.awsdns-26.com | 172800 |
| NS | ns-614.awsdns-12.net | 172800 |
| CAA | issue 0 letsencrypt.org | 86400 |
| TXT | v=spf1 include:_spf.google.com ip4:193.8.230.0/24 ip4:52.28.236.0 ip4:3.123.190.28 ~all | 86400 |
| AAAA | 2a05:d014:d43:3101:94aa:a276:e035:6a2a | 86400 |
Technology stack
SSL certificate
| Valid | Valid |
|---|---|
| Issuer | US, YE2, Let's Encrypt |
| Expires | January 28, 2027 |
| Days remaining | 79 |
| Protocol | TLSv1.3 |
| Names | fourmilab.ch, www.fourmilab.ch |
Email security
FScore 42/100 across SPF, DMARC, DKIM, MTA-STS and BIMI.
- warnDMARC policy is none (monitoring only). Spoofed mail is still delivered.
- warnDMARC has no rua= address, so you receive no reports about mail sent as your domain.
- warnNo DKIM key found at common selectors (google, selector1, selector2, default, k1, k2, s1, s2, ...). DKIM may still use a custom selector we cannot guess.
- warnNo MTA-STS: mail sent to you can be downgraded to an unencrypted connection.
- warnNo TLS-RPT record, so you won't hear about failed encrypted deliveries.
- warnNo BIMI record (optional: shows your logo next to your emails in supporting inboxes).
- goodSPF record found.
- goodSPF ends with ~all: servers you have not listed are marked as suspicious (soft fail).
- good5 MX record(s) found. Mail is handled by Google Workspace.
Homepage metadata
| Title | Fourmilab |
|---|---|
| Language | en |
| Indexable | Yes |
| Word count | 32 |
About fourmilab.ch
What technology does fourmilab.ch use?
We detected 2 technologies on fourmilab.ch, including HSTS, Nginx.
Does fourmilab.ch protect its email with SPF and DMARC?
fourmilab.ch scores 42/100 (grade F) for email security. DMARC policy is none (monitoring only). Spoofed mail is still delivered. DMARC has no rua= address, so you receive no reports about mail sent as your domain.
What are the name servers of fourmilab.ch?
fourmilab.ch uses ns-1463.awsdns-54.org, ns-1903.awsdns-45.co.uk, ns-209.awsdns-26.com, ns-614.awsdns-12.net.