diff --git a/mail/inc/class.mail_ui.inc.php b/mail/inc/class.mail_ui.inc.php
index 790090bd84..125c69867f 100644
--- a/mail/inc/class.mail_ui.inc.php
+++ b/mail/inc/class.mail_ui.inc.php
@@ -472,6 +472,7 @@ class mail_ui
 							'start'          =>	0,		// IO position in list
 							'order'          =>	'date',	// IO name of the column to sort after (optional for the sortheaders)
 							'sort'           =>	'DESC',	// IO direction of the sort: 'ASC' or 'DESC'
+							'no_columnselection' => $this->mail_bo->mailPreferences['previewPane'] == 'vertical'? true : false
 						);
 					}
 					if (Api\Header\UserAgent::mobile()) $content[self::$nm_index]['header_row'] = 'mail.index.header_right';
diff --git a/mail/templates/default/app.css b/mail/templates/default/app.css
index 7a31a4e702..9cacfcf15e 100644
--- a/mail/templates/default/app.css
+++ b/mail/templates/default/app.css
@@ -1025,9 +1025,6 @@ div#mail-index_nm.splitter-pane {min-height: 100px;}
 	margin-top: 1em;
 }
 
-#mail-index_nm thead tr th.optcol {
-	display: none;
-}
 #mail-index_nm .mail.row et2-url-email_ro {width: fit-content}
 #mail-index_nm  .et2_label.et2_vfs {text-align: center}
 
diff --git a/mail/templates/pixelegg/app.css b/mail/templates/pixelegg/app.css
index b508a39eae..a71c61f2c2 100755
--- a/mail/templates/pixelegg/app.css
+++ b/mail/templates/pixelegg/app.css
@@ -988,9 +988,6 @@ div#mail-index_nm.splitter-pane {
   border-top: 1px solid silver;
   margin-top: 1em;
 }
-#mail-index_nm thead tr th.optcol {
-  display: none;
-}
 #mail-index_nm .mail.row et2-url-email_ro {
   width: fit-content;
 }