diff --git a/test/mail_postfix_inet.bats b/test/mail_postfix_inet.bats
new file mode 100644
index 00000000..a42639be
--- /dev/null
+++ b/test/mail_postfix_inet.bats
@@ -0,0 +1,83 @@
+load 'test_helper/common'
+
+# Test case
+# ---------
+# POSTFIX_INET_PROTOCOLS value is set
+
+
+function setup() {
+    run_setup_file_if_necessary
+}
+
+function teardown() {
+    run_teardown_file_if_necessary
+}
+
+function setup_file() {
+    docker run -d --name mail_postfix_inet_default \
+		-v "`pwd`/test/config":/tmp/docker-mailserver \
+		-v "`pwd`/test/test-files":/tmp/docker-mailserver-test:ro \
+		-h mail.my-domain.com -t "${NAME}"
+
+    wait_for_finished_setup_in_container mail_postfix_inet_default
+
+    docker run -d --name mail_postfix_inet_all \
+		-v "`pwd`/test/config":/tmp/docker-mailserver \
+		-v "`pwd`/test/test-files":/tmp/docker-mailserver-test:ro \
+		-e POSTFIX_INET_PROTOCOLS=all \
+		-h mail.my-domain.com -t "${NAME}"
+
+    wait_for_finished_setup_in_container mail_postfix_inet_all
+
+    docker run -d --name mail_postfix_inet_ipv4 \
+		-v "`pwd`/test/config":/tmp/docker-mailserver \
+		-v "`pwd`/test/test-files":/tmp/docker-mailserver-test:ro \
+		-e POSTFIX_INET_PROTOCOLS=ipv4 \
+		-h mail.my-domain.com -t "${NAME}"
+
+    wait_for_finished_setup_in_container mail_postfix_inet_ipv4
+
+    docker run -d --name mail_postfix_inet_ipv6 \
+		-v "`pwd`/test/config":/tmp/docker-mailserver \
+		-v "`pwd`/test/test-files":/tmp/docker-mailserver-test:ro \
+		-e POSTFIX_INET_PROTOCOLS=ipv6 \
+		-h mail.my-domain.com -t "${NAME}"
+
+    wait_for_finished_setup_in_container mail_postfix_inet_ipv6
+}
+
+function teardown_file() {
+    docker rm -f mail_postfix_inet_default
+    docker rm -f mail_postfix_inet_all
+    docker rm -f mail_postfix_inet_ipv4
+    docker rm -f mail_postfix_inet_ipv6
+}
+
+@test "first" {
+  skip 'this test must come first to reliably identify when to run setup_file'
+}
+
+@test "checking postfix: inet default" {
+  run docker exec mail_postfix_inet_default postconf inet_protocols
+  assert_output "inet_protocols = all"
+  assert_success
+}
+@test "checking postfix: inet all" {
+  run docker exec mail_postfix_inet_all postconf inet_protocols
+  assert_output "inet_protocols = all"
+  assert_success
+}
+@test "checking postfix: inet ipv4" {
+  run docker exec mail_postfix_inet_ipv4 postconf inet_protocols
+  assert_output "inet_protocols = ipv4"
+  assert_success
+}
+@test "checking postfix: inet ipv6" {
+  run docker exec mail_postfix_inet_ipv6 postconf inet_protocols
+  assert_output "inet_protocols = ipv6"
+  assert_success
+}
+
+@test "last" {
+  skip 'this test is only there to reliably mark the end for the teardown_file'
+}