diff --git a/build-scripts/postfix-install.sh b/build-scripts/postfix-install.sh
index 034cb77..2182031 100644
--- a/build-scripts/postfix-install.sh
+++ b/build-scripts/postfix-install.sh
@@ -7,7 +7,7 @@ fi
 
 do_alpine() {
     apk update
-    apk add --upgrade cyrus-sasl cyrus-sasl-static cyrus-sasl-digestmd5 cyrus-sasl-crammd5 cyrus-sasl-login cyrus-sasl-ntlm
+    apk add --upgrade cyrus-sasl cyrus-sasl-static cyrus-sasl-digestmd5 cyrus-sasl-crammd5 cyrus-sasl-login cyrus-sasl-ntlm libsasl
     apk add postfix
     apk add opendkim
     apk add --upgrade ca-certificates tzdata supervisor rsyslog musl musl-utils bash opendkim-utils libcurl jsoncpp lmdb logrotate netcat-openbsd
@@ -21,7 +21,7 @@ do_ubuntu() {
     export DEBIAN_FRONTEND=noninteractive
     echo "Europe/Berlin" > /etc/timezone
     apt-get update -y -q
-    apt-get install -y libsasl2-modules
+    apt-get install -y libsasl2-modules sasl2-bin
     apt-get install -y postfix
     apt-get install -y opendkim
     apt-get install -y ca-certificates tzdata supervisor rsyslog bash opendkim-tools curl libcurl4 libjsoncpp25 sasl2-bin postfix-lmdb logrotate cron net-tools ${RELEASE_SPECIFIC_PACKAGES}
diff --git a/integration-tests/external-tools-test/tests/test.sh b/integration-tests/external-tools-test/tests/test.sh
index 3703a7f..391136f 100755
--- a/integration-tests/external-tools-test/tests/test.sh
+++ b/integration-tests/external-tools-test/tests/test.sh
@@ -10,4 +10,9 @@ fi
 if ! hash nc; then
     echo "netcat not found!" >2
     exit 1
+fi
+
+if ! hash pluginviewer && ! hash saslpluginviewer; then
+    echo "pluginviewer not found!" >2
+    exit 1
 fi
\ No newline at end of file
diff --git a/scripts/common-run.sh b/scripts/common-run.sh
index 3c8255e..f1a658c 100755
--- a/scripts/common-run.sh
+++ b/scripts/common-run.sh
@@ -325,6 +325,7 @@ EOF
 
 postfix_setup_xoauth2_post_setup() {
 	local other_plugins
+	local plugin_viewer="pluginviewer"
 	if [ -n "$XOAUTH2_CLIENT_ID" ] || [ -n "$XOAUTH2_SECRET" ]; then
 		do_postconf -e 'smtp_sasl_security_options='
 		do_postconf -e 'smtp_sasl_mechanism_filter=xoauth2'
@@ -338,7 +339,12 @@ postfix_setup_xoauth2_post_setup() {
 		# 
 		# The fix is therefore simple: If we're not using OAuth2, we remove the plugin from the list and
 		# keep all the plugins installed.
-		other_plugins="$(pluginviewer -c | grep Plugin | cut -d\  -f2 | cut -c2- | rev | cut -c2- | rev | grep -v EXTERNAL | grep -v sasl-xoauth2 | tr '\n' ',' | rev | cut -c2- | rev)"
+
+		if hash saslpluginviewer > /dev/null 2>&1; then
+			# Ubuntu/Debian have renamed pluginviewer to saslpluginviewer so this fails with those distros.
+			plugin_viewer="saslpluginviewer"
+		fi
+		other_plugins="$(${plugin_viewer} -c | grep Plugin | cut -d\  -f2 | cut -c2- | rev | cut -c2- | rev | grep -v EXTERNAL | grep -v sasl-xoauth2 | tr '\n' ',' | rev | cut -c2- | rev)"
 		do_postconf -e "smtp_sasl_mechanism_filter=${other_plugins}"
 	fi
 }