| Subdomain | First seen | Last seen | DNS | Certificate issuer | Report |
|---|
| www.yellsa.com | Mar 2015 | Jun 2026 | No DNS | Let's Encrypt | Report → |
| imap.yellsa.com | Aug 2025 | Aug 2025 | No DNS | Let's Encrypt | Report → |
| mail.yellsa.com | Aug 2025 | Aug 2025 | No DNS | Let's Encrypt | Report → |
| pop.yellsa.com | Aug 2025 | Aug 2025 | No DNS |
Found in public certificate transparency logs, which record every publicly trusted certificate. Some subdomains may no longer exist.