diff --git a/Cargo.lock b/Cargo.lock
index c066ee3..afbbcc1 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -116,7 +116,7 @@ dependencies = [
 
 [[package]]
 name = "carrier"
-version = "0.3.0"
+version = "0.3.1"
 dependencies = [
  "fluent-bundle",
  "fumi-core",
@@ -430,7 +430,7 @@ dependencies = [
 
 [[package]]
 name = "fumi-core"
-version = "0.1.0"
+version = "0.1.1"
 dependencies = [
  "chacha20poly1305",
  "data-encoding",
diff --git a/Cargo.toml b/Cargo.toml
index ba38e7e..b124695 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "carrier"
-version = "0.3.0"
+version = "0.3.1"
 edition = "2021"
 description = "A minimalist smolmail client built on fumi-core, with a Relm4 UI"
 license = "Apache-2.0"
diff --git a/data/com.randogoth.carrier.metainfo.xml b/data/com.randogoth.carrier.metainfo.xml
index 80ce224..e8a4fa9 100644
--- a/data/com.randogoth.carrier.metainfo.xml
+++ b/data/com.randogoth.carrier.metainfo.xml
@@ -14,6 +14,7 @@
   </description>
   <launchable type="desktop-id">com.randogoth.carrier.desktop</launchable>
   <releases>
+    <release version="0.3.1" date="2026-10-15"/>
     <release version="0.3.0" date="2026-10-14"/>
     <release version="0.2.0" date="2026-10-08"/>
     <release version="0.1.0" date="2026-10-03"/>
diff --git a/src/ops.rs b/src/ops.rs
index 8d3444f..103bce0 100644
--- a/src/ops.rs
+++ b/src/ops.rs
@@ -716,7 +716,14 @@ pub fn send(
         .collect();
     let draft = client::SendDraft {
         address: &addr,
-        text: body.to_string(),
+        // Trimmed at the send site, before the payload is signed, so the
+        // signature covers exactly the text the author meant. A compose buffer
+        // ends with whatever the author last pressed, and a trailing newline
+        // is not content — but it is content once it has been signed, and
+        // nothing downstream can remove it without invalidating the
+        // signature. smolboid, for one, refuses a post whose text carries a
+        // line break, because a published record is one line of a feed.
+        text: body.trim().to_string(),
         subject,
         reply_to,
         headers: &owned,