diff --git a/docs/content/config/environment.md b/docs/content/config/environment.md
index 3696c977..63df4ba9 100644
--- a/docs/content/config/environment.md
+++ b/docs/content/config/environment.md
@@ -343,13 +343,10 @@ Finally the logrotate interval **may** affect the period for generated reports.
 - **0** => SpamAssassin is disabled
 - 1 => SpamAssassin is enabled
 
-**/!\\ Spam delivery:** when SpamAssassin is enabled, messages marked as spam WILL NOT BE DELIVERED.
-Use `SPAMASSASSIN_SPAM_TO_INBOX=1` for receiving spam messages.
-
 ##### SPAMASSASSIN_SPAM_TO_INBOX
 
-- **0** => Spam messages will be bounced (_rejected_) without any notification (_dangerous_).
-- 1 => Spam messages will be delivered to the inbox and tagged as spam using `SA_SPAM_SUBJECT`.
+- **1** => Spam messages will be delivered to the inbox and tagged as spam using `SA_SPAM_SUBJECT`.
+- 0 => Spam messages will be bounced (_rejected_) without any notification (_dangerous_).
 
 ##### MOVE_SPAM_TO_JUNK
 
diff --git a/target/scripts/start-mailserver.sh b/target/scripts/start-mailserver.sh
index c85e7677..4bb020b4 100755
--- a/target/scripts/start-mailserver.sh
+++ b/target/scripts/start-mailserver.sh
@@ -61,8 +61,7 @@ VARS[SA_SPAM_SUBJECT]=${SA_SPAM_SUBJECT:="***SPAM*** "}
 VARS[SA_TAG]=${SA_TAG:="2.0"}
 VARS[SA_TAG2]=${SA_TAG2:="6.31"}
 VARS[SMTP_ONLY]="${SMTP_ONLY:=0}"
-VARS[SPAMASSASSIN_SPAM_TO_INBOX_SET]="${SPAMASSASSIN_SPAM_TO_INBOX:-not set}"
-VARS[SPAMASSASSIN_SPAM_TO_INBOX]="${SPAMASSASSIN_SPAM_TO_INBOX:=0}"
+VARS[SPAMASSASSIN_SPAM_TO_INBOX]="${SPAMASSASSIN_SPAM_TO_INBOX:=1}"
 VARS[SPOOF_PROTECTION]="${SPOOF_PROTECTION:=0}"
 VARS[SRS_SENDER_CLASSES]="${SRS_SENDER_CLASSES:=envelope_sender}"
 VARS[SSL_TYPE]="${SSL_TYPE:=}"
diff --git a/target/scripts/startup/setup-stack.sh b/target/scripts/startup/setup-stack.sh
index 58013aa6..6d25c165 100644
--- a/target/scripts/startup/setup-stack.sh
+++ b/target/scripts/startup/setup-stack.sh
@@ -1367,11 +1367,6 @@ function _setup_security_stack
 
       sed -i "s|\$final_spam_destiny.*=.*$|\$final_spam_destiny = D_BOUNCE;|g" /etc/amavis/conf.d/49-docker-mailserver
       sed -i "s|\$final_bad_header_destiny.*=.*$|\$final_bad_header_destiny = D_BOUNCE;|g" /etc/amavis/conf.d/49-docker-mailserver
-
-      if [[ ${VARS[SPAMASSASSIN_SPAM_TO_INBOX_SET]} == 'not set' ]]
-      then
-        _notify 'warn' 'Spam messages WILL NOT BE DELIVERED, you will NOT be notified of ANY message bounced. Please define SPAMASSASSIN_SPAM_TO_INBOX explicitly.'
-      fi
     fi
   fi
 
diff --git a/test/mail_spam_bounced.bats b/test/mail_spam_bounced.bats
index d1bbaeb4..dc11bcf6 100644
--- a/test/mail_spam_bounced.bats
+++ b/test/mail_spam_bounced.bats
@@ -33,6 +33,7 @@ function setup_file() {
 }
 
 @test "checking amavis: spam message is bounced (rejected)" {
+  # shellcheck disable=SC2034
   local TEST_DOCKER_ARGS=(
     --env ENABLE_SPAMASSASSIN=1
     --env SPAMASSASSIN_SPAM_TO_INBOX=0
@@ -40,25 +41,6 @@ function setup_file() {
 
   common_container_setup 'TEST_DOCKER_ARGS'
 
-  run _should_emit_warning
-  assert_failure
-
-  _should_bounce_spam
-}
-
-@test "checking amavis: spam message is bounced (rejected), undefined SPAMASSASSIN_SPAM_TO_INBOX should raise a warning" {
-  # SPAMASSASSIN_SPAM_TO_INBOX=0 is the default. If no explicit ENV value is set, it should log a warning at startup.
-
-  # shellcheck disable=SC2034
-  local TEST_DOCKER_ARGS=(
-    --env ENABLE_SPAMASSASSIN=1
-  )
-
-  common_container_setup 'TEST_DOCKER_ARGS'
-
-  run _should_emit_warning
-  assert_success
-
   _should_bounce_spam
 }
 
@@ -66,11 +48,6 @@ function setup_file() {
   skip 'this test is only there to reliably mark the end for the teardown_file'
 }
 
-# This warning should only be raised when the env SPAMASSASSIN_SPAM_TO_INBOX has no explicit value set
-function _should_emit_warning() {
-  sh -c "docker logs ${TEST_NAME} | grep 'Spam messages WILL NOT BE DELIVERED'"
-}
-
 function _should_bounce_spam() {
   wait_for_smtp_port_in_container_to_respond "${TEST_NAME}"
 
diff --git a/test/tests.bats b/test/tests.bats
index 96cba2e2..87a06ba3 100644
--- a/test/tests.bats
+++ b/test/tests.bats
@@ -23,7 +23,9 @@ setup_file() {
     -e ENABLE_MANAGESIEVE=1 \
     -e ENABLE_QUOTAS=1 \
     -e ENABLE_SPAMASSASSIN=1 \
+    -e SPAMASSASSIN_SPAM_TO_INBOX=0 \
     -e ENABLE_SRS=1 \
+    -e ENABLE_UPDATE_CHECK=0 \
     -e PERMIT_DOCKER=host \
     -e REPORT_RECIPIENT=user1@localhost.localdomain \
     -e REPORT_SENDER=report1@mail.my-domain.com \
@@ -244,6 +246,7 @@ teardown_file() {
   assert_success
 }
 
+# TODO add a test covering case SPAMASSASSIN_SPAM_TO_INBOX=1 (default)
 @test "checking smtp: delivers mail to existing account" {
   run docker exec mail /bin/sh -c "grep 'postfix/lmtp' /var/log/mail/mail.log | grep 'status=sent' | grep ' Saved)' | sed 's/.* to=</</g' | sed 's/, relay.*//g' | sort | uniq -c | tr -s \" \""
   assert_success
@@ -316,6 +319,7 @@ EOF
   assert_output 2
 }
 
+# TODO add a test covering case SPAMASSASSIN_SPAM_TO_INBOX=1 (default)
 @test "checking smtp: rejects spam" {
   run docker exec mail /bin/sh -c "grep 'Blocked SPAM' /var/log/mail/mail.log | grep external.tld=spam@my-domain.com | wc -l"
   assert_success