diff --git a/en_US/upgrade/0-upgrade.iredmail.1.4.0-1.4.1.md b/en_US/upgrade/0-upgrade.iredmail.1.4.0-1.4.1.md
index 69a695e8..de8a299c 100644
--- a/en_US/upgrade/0-upgrade.iredmail.1.4.0-1.4.1.md
+++ b/en_US/upgrade/0-upgrade.iredmail.1.4.0-1.4.1.md
@@ -62,11 +62,10 @@ server admin can update per-user spam policy to allow receiving such documents.
 
 Here we defines 5 ban rules:
 
-- `ALLOW_MS_OFFICE`: Allow all documents whose file name ends with any of
-  `.doc`, `.docx`, `.xls`, `.xlsx`, `.ppt`, `.pptx`.
-- `ALLOW_MS_WORD`: Allow just Microsoft Word documents (`.doc`, `.docx`).
-- `ALLOW_MS_EXCEL`: Allow just Microsoft Excel documents (`.xls`, `.xlsx`).
-- `ALLOW_MS_PPT`: Allow just Microsoft PowerPoint documents (`.ppt`, `.pptx`).
+- `ALLOW_MS_OFFICE`: Allow all Microsoft Office documents.
+- `ALLOW_MS_WORD`: Allow Microsoft Word documents (`.doc`, `.docx`).
+- `ALLOW_MS_EXCEL`: Allow Microsoft Excel documents (`.xls`, `.xlsx`).
+- `ALLOW_MS_PPT`: Allow Microsoft PowerPoint documents (`.ppt`, `.pptx`).
 - `DEFAULT`: use the default ban rule defined in `$banned_filename_re`.
 
 You're free to define more ban rules to fit your own needs.
diff --git a/html/upgrade.iredmail.1.4.0-1.4.1.html b/html/upgrade.iredmail.1.4.0-1.4.1.html
index fbe859f0..f6477f95 100644
--- a/html/upgrade.iredmail.1.4.0-1.4.1.html
+++ b/html/upgrade.iredmail.1.4.0-1.4.1.html
@@ -88,11 +88,10 @@ server admin can update per-user spam policy to allow receiving such documents.<
 </ul>
 <p>Here we defines 5 ban rules:</p>
 <ul>
-<li><code>ALLOW_MS_OFFICE</code>: Allow all documents whose file name ends with any of
-  <code>.doc</code>, <code>.docx</code>, <code>.xls</code>, <code>.xlsx</code>, <code>.ppt</code>, <code>.pptx</code>.</li>
-<li><code>ALLOW_MS_WORD</code>: Allow just Microsoft Word documents (<code>.doc</code>, <code>.docx</code>).</li>
-<li><code>ALLOW_MS_EXCEL</code>: Allow just Microsoft Excel documents (<code>.xls</code>, <code>.xlsx</code>).</li>
-<li><code>ALLOW_MS_PPT</code>: Allow just Microsoft PowerPoint documents (<code>.ppt</code>, <code>.pptx</code>).</li>
+<li><code>ALLOW_MS_OFFICE</code>: Allow all Microsoft Office documents.</li>
+<li><code>ALLOW_MS_WORD</code>: Allow Microsoft Word documents (<code>.doc</code>, <code>.docx</code>).</li>
+<li><code>ALLOW_MS_EXCEL</code>: Allow Microsoft Excel documents (<code>.xls</code>, <code>.xlsx</code>).</li>
+<li><code>ALLOW_MS_PPT</code>: Allow Microsoft PowerPoint documents (<code>.ppt</code>, <code>.pptx</code>).</li>
 <li><code>DEFAULT</code>: use the default ban rule defined in <code>$banned_filename_re</code>.</li>
 </ul>
 <p>You're free to define more ban rules to fit your own needs.</p>