Overview

Stalwart IMAP supports the most recent IMAP4rev2 protocol as well as the preceding IMAP4rev1. It also offers numerous IMAP4 extensions and a ManageSieve server which allows users to manipulate their Sieve scripts.

Listener

In order to be able to accept IMAP4 connections, a listener has to be created with the protocol attribute set to imap.

For example, to create a listener that accepts plain-text IMAP4 connections on port 143 and another one that accepts implicit TLS connections on port 993:

[server.listener."imap"]
bind = ["[::]:143"]
protocol = "imap"

[server.listener."imaptls"]
bind = ["[::]:993"]
protocol = "imap"
tls.implicit = true

Data backend

Both Stalwart IMAP server and JMAP server share the same data, blob and full-text store backend. This means that they use the same storage for metadata, settings, indexes, emails, and other binary data. Please refer to the Storage settings section for more information on how to configure the data backend.