diff --git a/setup/flavors/compose/mailu.env b/setup/flavors/compose/mailu.env
index 1d98c528..2963c882 100644
--- a/setup/flavors/compose/mailu.env
+++ b/setup/flavors/compose/mailu.env
@@ -96,7 +96,7 @@ WELCOME_SUBJECT={{ welcome_subject or 'Welcome to your new email account' }}
 WELCOME_BODY={{ welcome_body or 'Welcome to your new email account, if you can read this, then it is configured properly!' }}
 
 # Maildir Compression
-# choose compression-method, default: none (value: gz, bz2, lz4, zstd)
+# choose compression-method, default: none (value: gz, bz2)
 COMPRESSION={{ compression }}
 # change compression-level, default: 6 (value: 1-9)
 COMPRESSION_LEVEL={{ compression_level }}
diff --git a/towncrier/newsfragments/2139.bugfix b/towncrier/newsfragments/2139.bugfix
new file mode 100644
index 00000000..24aba349
--- /dev/null
+++ b/towncrier/newsfragments/2139.bugfix
@@ -0,0 +1,5 @@
+Remove the misleading text in mailu.env that zstd and lz4 are supported for dovecot mail compression.
+Zstd and lz4 are not supported. The reason is that the alpine project does not compile this
+into the dovecot package.
+Users who want this funcionality, can kindly request the alpine project to compile dovecot
+with lz4&zstd support.