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Stalwart Mail Server

Robust full featured mail infrastructure in Rust

Self-hosting an e-mail server is notoriously difficult. While privacy is a top concern for many individuals and businesses, the complexities of self-hosting a mail server often outweigh the benefits, leading many to choose to sacrifice some privacy and pay a third-party provider to manage their email instead. One of the key challenges of self-hosting an email server is the outdated and complex nature of most available open-source mail server software.

Stalwart Mail Server is an open-source email server written in Rust that aims to help modernize, democratize, and promote decentralization of email. The server offers a robust and privacy-focused solution that is easy for individuals and businesses to set up and maintain on their own.

Stalwart Mail Server consists of three components: a JMAP server, an IMAP4 server with support for ManageSieve as well as many extensions, and an SMTP server with support for DMARC, DKIM, ARC, and SPF. The server does not require any external software or databases to run and can easily scale to multiple servers thanks to its native Raft support.

Furthermore, the use of Rust in Stalwart Mail Server allows it to offer improved performance, safety, and concurrency compared to other solutions, making it a versatile and robust choice for those looking to self-host their own email server.

Run by Stalwart Labs Ltd.

Logo NLnet: abstract logo of four people seen from above Logo NGI Zero: letterlogo shaped like a tag

This project was funded through the NGI0 Entrust Fund, a fund established by NLnet with financial support from the European Commission's Next Generation Internet programme, under the aegis of DG Communications Networks, Content and Technology under grant agreement No 101069594.

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Please check out NLnet's theme funds, such as NGI Assure and NGI Zero Entrust.

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