1stalwartlabs / stalwartAll-in-one Mail & Collaboration server. Secure, scalable and fluent in every protocol (IMAP, JMAP, SMTP, CalDAV, CardDAV, WebDAV).imapjmapmailrustserversmtp+4 moreRustNo license16K total1K forks+328 starsfrom 15,297 · score 5.80
2rustmailer / bichonBichon – A lightweight, high-performance Rust email archiver with WebUIbackupcompressionemailemail-archiveremail-archivingimap+9 moreRustAGPL-3.02.1K total90 forks+15 starsfrom 2,047 · score 2.77