diff --git a/Dockerfile b/Dockerfile
index 3febc26..bba696d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -46,6 +46,8 @@ RUN apk --no-cache add \
     libressl \
     libressl2.6-libssl \
     libressl2.6-libcrypto \
+    ssmtp \
+    ca-certificates \
     lua
 
 RUN addgroup -g 2222 dovecot
@@ -54,6 +56,9 @@ RUN adduser -u 2222 -h /home/dovecot -D -G dovecot dovecot
 RUN addgroup -g 1111 vmail
 RUN adduser -u 1111 -h /var/lib/vmail -D -G vmail vmail
 
+RUN mkdir -p /etc/dovecot/conf.d
+RUN mkdir /var/lib/vmail/sieve-after/
+
 EXPOSE 143 4190 6334 7777
 
 VOLUME /var/lib/vmail/mail/ /etc/ssl/mail