YariloMail
An open-source, high-performance mail server
A scalable, standards-compliant mail server speaking IMAP, POP3, JMAP, Submission and SIEVE, with built-in full-text search — a drop-in replacement for your current mail stack.
Features
High performance
Among the best-performing IMAP servers while supporting standard mailbox formats. Mailboxes are transparently indexed for excellent throughput and full compatibility.
Flexible authentication
Feature-rich user authentication supporting many different authentication databases and mechanisms.
Standards compliant
Passes IMAP server standards-compliance tests where many other servers fall short.
Easy migration
Drop-in compatible with existing deployments, allowing the change to be transparent to existing users.
Cluster-ready
Mailboxes and their indexes can be shared across multiple nodes on clustered storage while still performing well.
Security-focused
Designed with security in mind at every layer. Report vulnerabilities via our security page.
Full-text search
Built-in FTS engine indexes message bodies and attachments for instant server-side search across the whole mailbox.
Hybrid infrastructure
Runs across hybrid setups — on-prem, cloud or both — with mixed data storages: different mailbox formats and storage backends coexist in a single deployment.
User-group isolation
Isolate groups of users on dedicated backend groups, each with its own storage type — tag-based separation within one cluster.
Advanced API
A high-quality administration and automation API out of the box — manage users, mailboxes and the cluster programmatically.