| Feature | SnappyMail 2.22 | RainLoop 1.17 |
|---|---|---|
| IMAP | ✅ | ✅ |
| SMTP | ✅ | ✅ |
| Sieve | ✅ | ½ (own scripts only) |
| Responsive design | ✅ | ½ (user-agent sniffing) |
| Dark mode | ✅ | ❌ |
| Gmagick / ImageMagick | ✅ | ❌ |
| ICU 4.6 domainnames | ✅ | ❌ |
| jCard | ✅ | ❌ |
| MySQL/MariaDB utf8mb4 | ✅ | ❌ |
| Phar | ✅ | ❌ |
| Plugins CSS | ✅ | ❌ |
| Remove message colors | ✅ | ❌ |
| Set Sender | ✅ | ❌ |
| Sort messages by date/size/subject | ✅ | ❌ |
| Spam score visible | ✅ | ❌ |
| DropBox | ❌ | ✅ |
| GMail | ½ | ✅ |
| OAuth2 | ½ | ✅ |
| POP3 | ❌ | ✅ |
| Sentry | ❌ | ✅ |
| X-Mailer header | ❌ | ✅ |
| jQuery | ❌ | ✅ |
| Encryption security | ||
| OpenSSL | ✅ | ❌ |
| Sodium | ✅ | ❌ |
| XXTEA | ✅ | ✅ |
| IMAP RFC | ||
| 2342 NAMESPACE | ✅ | ✅ |
| 2971 ID | ✅ | ❌ |
| 3516 BINARY | ✅ | ❌ |
| 4314 ACL | ½ (info) | ❌ |
| 4731 ESEARCH | ✅ | ✅ |
| 5161 ENABLE | ✅ | ❌ |
| 5256 SORT & THREAD | ✅ | ✅ |
| 5258 LIST-EXTENDED | ✅ | ❌ |
| 5267 ESORT | ✅ | ✅ |
| 5464 METADATA | ✅ | ❌ |
| 5788 keywords | ✅ | ✅ |
| 5819 LIST-STATUS | ✅ | ½ (info) |
| 6154 SPECIAL-USE | ✅ | ❌ |
| 6851 MOVE | ✅ | ✅ |
| 6855 UTF8 | ✅ | ❌ |
| 7162 CONDSTORE + QRESYNC | ½ | ❌ |
| 7377 MULTISEARCH | ✅ (info) | ❌ |
| 7628 OAUTHBEARER | ✅ | ❌ |
| 7889 APPENDLIMIT | ½ | ❌ |
| 8474 Object Identifiers | ½ | ❌ |
| 8508 REPLACE | ✅ | ❌ |
| 8621 JMAP | ½ | ❌ |
| 9051 IMAP4rev2 | ½ | ❌ |
| Browsers | ||
| Chrome | 80+ | ✅ |
| Edge WebKit | 80+ | ✅ |
| Edge Legacy | ❌ | ✅ |
| Firefox | 78+ | ✅ |
| Internet Explorer | ❌ | ✅ |
| Opera | 67+ | ✅ |
| Safari | 13.1+ | ✅ |
| SeaMonkey | ❌ (info) | ✅ |
| Mobile Browsers | ||
| Chrome | ✅ | ✅ |
| Brave | ✅ | ✅ |
| DuckDuckGo | ✅ | ✅ |
| Firefox | ✅ | ✅ |
| Firefox Focus | ✅ | ✅ |
| Fulguris | ✅ | ✅ |
| Safari | ✅ | ✅ |
| Samsung | ✅ | ✅ |
| Styx | ✅ | ✅ |
| Security | ||
| Syslog login errors | ✅ | ❌ |
| Sec-Fetch | ✅ | ❌ |
| Admin TOTP 2FA | ✅ | ❌ |
| Admin default password | ❌ (random) | ✅ (12345) |
| User change password | 🔌 | ✅ + 🔌 |
| User TOTP 2FA | 🔌 (info) | ✅ |
| OpenPGP (RFC 3156 + 4880 + 5581 + 6637 + draft rfc4880bis) | ||
| GnuPG | ✅ | ❌ |
| Mailvelope | ✅ | ❌ |
| OpenPGP.js v5 | ✅ | ❌ |
| PGP/Inline | ✅ | ✅ |
| PGP/MIME | ✅ | ❌ |
| ECC keys (ECDSA/EDDSA) | ✅ | ❌ |
| Encrypt whole message | ✅ | ❌ |
| WYSIWYG (only SnappyMail supports plugins) | ||
| Squire | ✅ | ❌ |
| CKEditor 4 | ❌ (info) | ✅ |
| CKEditor 5 | 🔌 (not yet) | ❌ |
| Pell | 🔌 (not yet) | ❌ |
| Quill | 🔌 (not yet) | ❌ |
| SCEditor | 🔌 (not yet) | ❌ |
| Suneditor | 🔌 (not yet) | ❌ |
| TinyMCE | 🔌 (not yet) | ❌ |
| Trix | 🔌 (not yet) | ❌ |
| many more | 🔌 (not yet) | ❌ |
| Integrations: | ||
| Arch Linux | ✅ | ✅ |
| Cloudron forum | ✅ | ✅ |
| cPanel | ✅ (info) | ❌ |
| CyberPanel | ✅ | ✅ |
| HestiaCP | ❌ (info) | ✅ |
| Kolab | ½ (progress) | ❌ |
| NextCloud | ✅ | ✅ |
| QNAP | ✅ | ✅ |
| Virtualmin | ❌ info | ❌ |
| Social: | ||
| ❌ | ✅ | |
| ❌ | ✅ | |
| ❌ | ✅ | |
| Sender photo/avatar (info) | ||
| BIMI | 🔌 | ❌ |
| Gravatar | 🔌 | ✅ |
| Identicon | 🔌 | ❌ |
| Size and compression: | ||
| Brotli | ✅ | ❌ |
| PHP Gzip | ✅ | ❌ |
| Login (no compression) | 486 KB | 2.13 MB |
| Login (compressed)* | 138 KB | 602 KB |
* Login compressed output for SnappyMail is pre-compressed using Brotli, and RainLoop is based on Apache deflate.