diff --git a/README.md b/README.md
index acce220..a0570d4 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@
 **INBUXA** is a mail and collaboration server: JMAP, IMAP, POP3, SMTP,
 CalDAV, CardDAV and WebDAV, in one Rust binary, with ihasmail as its web front
 end. It is a fork of [Stalwart](https://github.com/stalwartlabs/stalwart).
-Project site: [inbuxa.org](https://inbuxa.org) (not up yet).
+Project site: [inbuxa.org](https://inbuxa.org). Documentation: [docs.inbuxa.org](https://docs.inbuxa.org).
 
 Stalwart ships some features only in a paid Enterprise Edition: multi-tenancy,
 masked email, undelete and others. INBUXA ships everything to everybody under
diff --git a/crates/types/src/branding.rs b/crates/types/src/branding.rs
index a885b16..58a8371 100644
--- a/crates/types/src/branding.rs
+++ b/crates/types/src/branding.rs
@@ -71,12 +71,12 @@ pub fn env_var(name: &str) -> Result<String, std::env::VarError> {
 #[macro_export]
 macro_rules! brand_version {
     () => {
-        "2026.9.18"
+        "2026.9.20"
     };
 }
 
 /// The version with the Stalwart release it's built on, e.g.
-/// `2026.9.18 (Stalwart 0.16.22)`. The base comes from Cargo, which follows
+/// `2026.9.20 (Stalwart 0.16.22)`. The base comes from Cargo, which follows
 /// upstream, so it's always the base actually compiled in. It matters because
 /// Stalwart's data upgrades are one-way. Once INBUXA stops tracking upstream,
 /// this becomes just the version.
diff --git a/install.sh b/install.sh
index c64f3ed..d57a165 100644
--- a/install.sh
+++ b/install.sh
@@ -3,10 +3,24 @@
 # SPDX-License-Identifier: AGPL-3.0-only
 #
 # Upstream's install.sh downloads Stalwart's release binaries from GitHub, so
-# it would install Stalwart, not INBUXA. It's replaced with this notice until
-# INBUXA publishes releases of its own.
+# it would install Stalwart, not INBUXA. It is replaced with this notice.
+#
+# A single-command installer is specified (docs/spec/SPEC.md 6.1) and is still
+# to be built. Until it lands there is no unattended install to run, and this
+# script says so rather than half-doing one: an installer that is trusted with
+# a mail host is not a thing to improvise.
 
-echo "INBUXA has no releases yet, so there is nothing to install." >&2
-echo "Build from source instead:  cargo build --release -p inbuxa" >&2
-echo "See https://inbuxa.org once it's up." >&2
+echo "INBUXA has no unattended installer yet." >&2
+echo >&2
+echo "Build the server from source:" >&2
+echo "    cargo build --release -p inbuxa" >&2
+echo >&2
+echo "Or build the container image from this tree:" >&2
+echo "    docker build -t inbuxa ." >&2
+echo >&2
+echo "A server started with no configuration comes up in bootstrap mode;" >&2
+echo "INBUXA Admin's setup wizard completes first boot over JMAP." >&2
+echo >&2
+echo "Releases:  https://github.com/inbuxa/inbuxa-server/releases" >&2
+echo "Docs:      https://docs.inbuxa.org/install/fresh/" >&2
 exit 1