Release: Thunderbird 18.0

Author: thunderbird-botmobile[bot]

app-metadata/net.thunderbird.android/en-US/changelogs/22.txt

@@ -0,0 +1,17 @@
+Thunderbird version 18.0
+
+New:
+- PNG avatars
+- Setting to display ISO date/time in message list
+- Fixed-width font for composing
+
+Changed:
+- Attachment summary moved to header
+
+Fixed:
+- "Delete (from notification)" setting did not retain state
+- Find folder search hint text was cut off
+- User not notified if offline when sending message
+- CC/BCC fields were not expanded by default for Reply All
+- Crash occurred when retrieving images
+- Deleted messages could remain visible in message list

app-thunderbird/build.gradle.kts

@@ -14,7 +14,7 @@ android {
         applicationId = "net.thunderbird.android"
         testApplicationId = "net.thunderbird.android.tests"
 
-        versionCode = 21
+        versionCode = 22
         versionName = "18.0"
 
         buildConfigField("String", "CLIENT_INFO_APP_NAME", "\"Thunderbird for Android\"")

app-thunderbird/src/release/res/raw/changelog_master.xml

@@ -1,6 +1,21 @@
 <?xml version="1.0" encoding="utf-8"?>
 <?xml-stylesheet type="text/xsl" href="changelog_style.xsl"?>
 <changelog>
+    <release version="18.0" versioncode="22" date="2026-04-14">
+        <change>New: Add support for PNG avatars</change>
+        <change>New: Add setting to display ISO date and time in message list</change>
+        <change>New: Used fixed-width font for composing when user chooses fixed-width for viewing</change>
+        <change>Changed: Attachment summary moved from message bottom to header for visibility</change>
+        <change>Fixed: EHLO parsing exception appeared in logcat when sending email</change>
+        <change>Fixed: &#34;Delete (from notification)&#34; setting did not retain state</change>
+        <change>Fixed: Find folder search hint text was cut off on smaller screens</change>
+        <change>Fixed: User was not notified if they were offline when sending message</change>
+        <change>Fixed: &#34;Sent folder not found&#34; warning occurred when uploading sent messages was disabled</change>
+        <change>Fixed: Loading bar appeared detached from header, leaving visible gap</change>
+        <change>Fixed: CC/BCC fields were not expanded by default for Reply All</change>
+        <change>Fixed: Crash occurred when retrieving images from large messages</change>
+        <change>Fixed: Deleted messages could remain visible in message list</change>
+    </release>
     <release version="17.0" versioncode="21" date="2026-03-16">
         <change>New: Account avatar customization</change>
         <change>New: Foldable device support with split-screen</change>

metadata

@@ -1 +1 @@
-app-metadata/com.fsck.k9
+app-metadata/net.thunderbird.android