diff --git a/Dockerfile b/Dockerfile
index 3533a40..6d821ee 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,11 +1,19 @@
-FROM alpine:3.11
+FROM alpine:3.17
+# DO NOT set alpine:3.13, 3.14, as they BREAK postfix smptd !
+# postfix_1       | mail.err: Jul 27 12:49:52 postfix/trivial-rewrite[84]: error: unsupported dictionary type: hash
+# https://gitlab.alpinelinux.org/alpine/aports/-/issues/12381
+# https://gitlab.alpinelinux.org/alpine/aports/-/issues/12085
+# workaround: change btree and hash to lmdb
+
 MAINTAINER Andrey Arapov <andrey.arapov@nixaid.com>
 
 RUN apk update && \
     apk upgrade && \
-    apk add postfix runit socklog tzdata ca-certificates && \
+    apk add postfix runit socklog tzdata ca-certificates spamassassin-client && \
     rm -rf /etc/service
 
+#RUN adduser -D -H -u 1005 -G postfix -s /sbin/nologin spamc
+
 # tzdata - for passing TZ environment variable.
 # socklog - collect all logs which come to /dev/log.