diff --git a/src/mailsrv/Containerfile b/src/mailsrv/Containerfile
index 27f34e9..7a97424 100644
--- a/src/mailsrv/Containerfile
+++ b/src/mailsrv/Containerfile
@@ -26,7 +26,7 @@ ARG FILESUID=5000
 ARG DEBIAN_FRONTEND=noninteractive
 
 # install packages we want
-RUN apt update -y && apt install -y rsyslog postfix dovecot-imapd dovecot-lmtpd
+RUN apt update -y && apt install -y rsyslog postfix dovecot-imapd dovecot-lmtpd dovecot-sieve
 
 # add virtual mail user
 RUN addgroup --gid ${FILESUID:?} vmail && \
diff --git a/src/mailsrv/assets/dovecot/conf.d/10-mail.conf b/src/mailsrv/assets/dovecot/conf.d/10-mail.conf
index 337d8d5..98a397e 100644
--- a/src/mailsrv/assets/dovecot/conf.d/10-mail.conf
+++ b/src/mailsrv/assets/dovecot/conf.d/10-mail.conf
@@ -46,7 +46,7 @@ namespace inbox {
   # Hierarchy separator to use. You should use the same separator for all
   # namespaces or some clients get confused. '/' is usually a good one.
   # The default however depends on the underlying mail storage format.
-  #separator = 
+  separator = /
 
   # Prefix required to access this namespace. This needs to be different for
   # all namespaces. For example "Public/".
diff --git a/src/mailsrv/assets/dovecot/conf.d/15-mailboxes.conf b/src/mailsrv/assets/dovecot/conf.d/15-mailboxes.conf
index bfc0a4d..d88460a 100644
--- a/src/mailsrv/assets/dovecot/conf.d/15-mailboxes.conf
+++ b/src/mailsrv/assets/dovecot/conf.d/15-mailboxes.conf
@@ -54,6 +54,9 @@ namespace inbox {
   mailbox Trash {
     special_use = \Trash
   }
+  mailbox Archive {
+    special_use = \Archive
+  }
 
   # For \Sent mailboxes there are two widely used names. We'll mark both of
   # them as \Sent. User typically deletes one of them if duplicates are created.
diff --git a/src/mailsrv/assets/dovecot/conf.d/20-lmtp.conf b/src/mailsrv/assets/dovecot/conf.d/20-lmtp.conf
index 7acbfed..d18433b 100644
--- a/src/mailsrv/assets/dovecot/conf.d/20-lmtp.conf
+++ b/src/mailsrv/assets/dovecot/conf.d/20-lmtp.conf
@@ -25,5 +25,5 @@ lda_mailbox_autosubscribe = yes
 
 protocol lmtp {
   # Space separated list of plugins to load (default is global mail_plugins).
-  #mail_plugins = $mail_plugins
+  mail_plugins = $mail_plugins sieve
 }