diff --git a/build-version-via-dockerfile.sh b/build-version-via-dockerfile.sh
index 178f58d..66a5b9d 100755
--- a/build-version-via-dockerfile.sh
+++ b/build-version-via-dockerfile.sh
@@ -23,7 +23,10 @@ do
         version=$(echo $df | cut -d_ -f 2)
         tag=${name}:${version}
 
-        docker build -t ${tag} -f ${df} .
+        # only build if not already existing
+        if ! docker pull ${tag}; then
+            docker build -t ${tag} -f ${df} .
+        fi
 
         if [ "$push" ]; then
             docker push ${tag}
diff --git a/ungleich-mail/Dockerfile_3.22 b/ungleich-mail/Dockerfile_3.22
index dc7eb68..261b097 100644
--- a/ungleich-mail/Dockerfile_3.22
+++ b/ungleich-mail/Dockerfile_3.22
@@ -1,8 +1,6 @@
 FROM alpine:3.22
 
-RUN apk add --update \
-    postfix \
-    dovecot dovecot-lmtpd dovecot-pop3d
+RUN apk add --update postfix dovecot dovecot-lmtpd dovecot-pop3d dovecot-pgsql
 
 RUN postconf maillog_file=/dev/stdout
-RUN echo log_path = /dev/stderr > /etc/dovecot/conf.d/10-logging.conf
+# RUN echo log_path = /dev/stderr > /etc/dovecot/conf.d/10-logging.conf
diff --git a/ungleich-mail/Dockerfile_3.22-r1 b/ungleich-mail/Dockerfile_3.22-r1
deleted file mode 100644
index 59b30c8..0000000
--- a/ungleich-mail/Dockerfile_3.22-r1
+++ /dev/null
@@ -1,6 +0,0 @@
-FROM alpine:3.22
-
-RUN apk add --update \
-    postfix \
-    dovecot dovecot-lmtpd dovecot-pop3d \
-    opendkim-utils opendkim
diff --git a/ungleich-mail/Dockerfile_3.23 b/ungleich-mail/Dockerfile_3.23
new file mode 100644
index 0000000..90266bd
--- /dev/null
+++ b/ungleich-mail/Dockerfile_3.23
@@ -0,0 +1,8 @@
+FROM alpine:3.23
+
+RUN apk add --update \
+    postfix \
+    dovecot dovecot-lmtpd dovecot-pop3d
+
+RUN postconf maillog_file=/dev/stdout
+#RUN echo log_path = /dev/stderr > /etc/dovecot/conf.d/10-logging.conf