diff --git a/imap.Dockerfile b/imap.Dockerfile
deleted file mode 100644
index 14859a5..0000000
--- a/imap.Dockerfile
+++ /dev/null
@@ -1,15 +0,0 @@
-FROM debian:buster
-
-RUN apt-get update \
-    && DEBIAN_FRONTEND=noninteractive \
-    apt-get install -y --no-install-recommends \
-    ca-certificates \
-    curl \
-    dovecot-imapd \
-    psmisc \
-    && apt-get clean \
-    && rm -rf /var/lib/apt/lists/*
-
-EXPOSE 25
-
-COPY docker/start-postfix.sh /usr/local
\ No newline at end of file
diff --git a/smtp.Dockerfile b/smtp.Dockerfile
index 39a9195..8ed5da3 100644
--- a/smtp.Dockerfile
+++ b/smtp.Dockerfile
@@ -1,4 +1,4 @@
-FROM debian:buster
+FROM debian:buster-slim
 
 RUN apt-get update \
     && DEBIAN_FRONTEND=noninteractive \
@@ -26,4 +26,4 @@ VOLUME /home/catchall/Maildir
 
 COPY docker/run-postfix /usr/local/bin/run-postfix
 
-CMD ["dumb-init", "/usr/local/bin/run-postfix"]
\ No newline at end of file
+CMD ["dumb-init", "/usr/local/bin/run-postfix"]