Self-hosted projects tagged “SMTP”
40 open source projects with this tag
40 services found
Exim
Configurable SMTP message transfer agent for Unix-like systems
Exim is an open source SMTP message transfer agent (MTA) for Unix-like systems, offering flexible mail routing and extensive controls for handling inbound email.
HiveDAV
Curlable free/busy scheduler with CalDAV integration
A lightweight, curl-first free/busy scheduler that syncs availability from a CalDAV calendar and can send iCal booking invites via SMTP.
OpenSMTPD
Secure, lightweight SMTP server implementation compliant with RFC 5321
OpenSMTPD is an open-source, minimal SMTP daemon from the OpenBSD project providing an RFC-compliant MTA with privilege separation, table backends, filters and TLS support.
Postfix
Secure and efficient SMTP mail transfer agent (MTA)
Postfix is a fast, secure, and easy-to-administer SMTP server for sending and routing email on Unix-like systems, commonly used as an MTA or mail relay.
Sendmail Open Source
Open source subset of Sendmail Sentrion for enterprise email environments.
Open Source Sendmail provides a subset of Proofpoint's Sendmail Sentrion MTA for large-scale mail deployments; current release is 8.16.1 with a PGP-signed tarball and OpenDKIM integration.
Simple NixOS Mailserver
NixOS module for running a complete email server stack
Simple NixOS Mailserver provides NixOS modules to deploy a full email server with SMTP/IMAP, spam filtering, DKIM/DMARC/SPF, and TLS automation.
SquirrelMail
Browser-based IMAP webmail client written in PHP
Lightweight PHP webmail client for IMAP/SMTP servers, offering a simple interface, plugin extensibility, and broad compatibility with standard mail backends.
Zimbra Collaboration
Enterprise email, calendar, contacts, and collaboration suite
Self-hosted enterprise collaboration suite providing email, webmail, calendaring, contacts, and administration for organizations.
chasquid
Simple and secure SMTP mail transfer agent (MTA)
chasquid is a minimalist SMTP server (MTA) for individuals and small groups, focused on secure defaults, easy configuration, and straightforward operation.
memEx
Structured personal knowledge base inspired by Zettelkasten and Org mode
Self-hosted, multi-user personal knowledge base for notes, linked contexts, and process pipelines, with backlinks and per-item privacy controls.