Writing an open source mail server from scratch: what are the most import features for a self-hosted mail server?

• lttrs-android

  4 235 2.7 Java

  No-frills, easy to use, easy to maintain Email client for Android based on the JSON Meta Application Protocol (JMAP).

JMAP (the modern successor of IMAP & SMTP and maybe test with a FOSS client) — Does any of the popular self hosting solutions support this after all this years?

• rust

  2,680 92,627 10.0 Rust

  Empowering everyone to build reliable and efficient software.

  

use a modern yet attractive stack that will attract other devs (no C, maybe Rust, Crystal, Nim or Go?)

• InfluxDB

  www.influxdata.com sponsored

  Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.

  

• zeyple

  3 141 0.0 Python

  Postfix filter/hook to automatically encrypt outgoing emails with PGP/GPG

transparent encryption of stored emails per default like in the Dovecot mail-crypt plugin plus the option for automatic encryption like in Zeyple

• Roundcube

  35 5,501 9.5 PHP

  The Roundcube Webmail suite

  

Regarding the frontend I would rather focus on using an existing one. I.e. using Roundcube if you want to stay fully traditional or use the Protonmail frontend if you want to create a new FOSS Protonmail with secure defaults.

• Nim

  346 16,048 9.9 Nim

  Nim is a statically typed compiled systems programming language. It combines successful concepts from mature languages like Python, Ada and Modula. Its design focuses on efficiency, expressiveness, and elegance (in that order of priority).

  

use a modern yet attractive stack that will attract other devs (no C, maybe Rust, Crystal, Nim or Go?)

• ProtonMail Web Client

  180 4,096 10.0 TypeScript

  Monorepo hosting the proton web clients

  

Regarding the frontend I would rather focus on using an existing one. I.e. using Roundcube if you want to stay fully traditional or use the Protonmail frontend if you want to create a new FOSS Protonmail with secure defaults.

• neutron

  8 501 10.0 Go

  Discontinued Self-hosted server for the ProtonMail client

Some folks once started a free implementation of the Protonmail backend in Go. Maybe you want to revive it?

• WorkOS

  workos.com sponsored

  The modern identity platform for B2B SaaS. The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning.

  

• crystal

  239 19,098 9.8 Crystal

  The Crystal Programming Language

  

use a modern yet attractive stack that will attract other devs (no C, maybe Rust, Crystal, Nim or Go?)

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