diff --git a/en_US/iredmail-easy/4-iredmail-easy.release.notes.md b/en_US/iredmail-easy/4-iredmail-easy.release.notes.md
index dbe332b7..458e995d 100644
--- a/en_US/iredmail-easy/4-iredmail-easy.release.notes.md
+++ b/en_US/iredmail-easy/4-iredmail-easy.release.notes.md
@@ -5,7 +5,9 @@
 ## Version: 2020082501 (Aug 25, 2020) {: id=20200825 }
 
 * SOGo:
-    - Upgrade SOGo to the latest v5 branch, nightly bulid.
+    - Upgrade SOGo to the latest v5 branch (nightly bulid) on Linux.
+    - With SOGo v5, it now send email via submission service (port 587) without
+      ssl cert verification.
 
 * Nginx:
     - Enable http2 for https sites by default.
diff --git a/html/iredmail-easy.release.notes.html b/html/iredmail-easy.release.notes.html
index 4f1cb4ce..1b278788 100644
--- a/html/iredmail-easy.release.notes.html
+++ b/html/iredmail-easy.release.notes.html
@@ -52,7 +52,9 @@
 <li>
 <p>SOGo:</p>
 <ul>
-<li>Upgrade SOGo to the latest v5 branch, nightly bulid.</li>
+<li>Upgrade SOGo to the latest v5 branch (nightly bulid) on Linux.</li>
+<li>With SOGo v5, it now send email via submission service (port 587) without
+  ssl cert verification.</li>
 </ul>
 </li>
 <li>