diff --git a/pages/spamfilter/mzta-spamfilter.js b/pages/spamfilter/mzta-spamfilter.js
index e2e0a36a..a40cbe21 100644
--- a/pages/spamfilter/mzta-spamfilter.js
+++ b/pages/spamfilter/mzta-spamfilter.js
@@ -80,6 +80,7 @@ document.addEventListener('DOMContentLoaded', async () => {
     let spamfilter_textarea = document.getElementById('spamfilter_prompt_text');
     let spamfilter_save_btn = document.getElementById('btn_save_prompt');
     let spamfilter_reset_btn = document.getElementById('btn_reset_prompt');
+    let spamfilter_use_specific_integration = document.getElementById('spamfilter_use_specific_integration');
 
     spamfilter_textarea.addEventListener('input', (event) => {
         spamfilter_reset_btn.disabled = (event.target.value === browser.i18n.getMessage('prompt_spamfilter_full_text'));
@@ -91,6 +92,12 @@ document.addEventListener('DOMContentLoaded', async () => {
         }
     });
 
+    spamfilter_use_specific_integration.addEventListener('change', (event) => {
+        if (!event.target.checked) {
+          browser.storage.sync.set({ spamfilter_connection_type: '' });
+        }
+    });
+
     spamfilter_reset_btn.addEventListener('click', () => {
         spamfilter_textarea.value = browser.i18n.getMessage('prompt_spamfilter_full_text');
         spamfilter_reset_btn.disabled = true;