diff --git a/admin/templates/default/config.xet b/admin/templates/default/config.xet
index 1367acbda3..a629dc9a51 100644
--- a/admin/templates/default/config.xet
+++ b/admin/templates/default/config.xet
@@ -294,6 +294,18 @@
 					</vbox>
 					<textbox id="newsettings[recaptcha_site]" size="60"/>
 				</row>
+				<row>
+					<description value="appearance" span="all" class="subHeader"/>
+				</row>
+					<description value="Encryption" span="all" class="subHeader"/>
+				</row>
+				<row>
+					<description value="Disable PGP encryption (Mailvelope)" lable="%s:"/>
+					<select id="newsettings[disable_pgp_encryption]">
+						<option value="">{No} - {Default}</option>
+						<option value="True">Yes</option>
+					</select>
+				</row>
 			</rows>
 		</grid>
 	</template>
diff --git a/api/src/Hooks.php b/api/src/Hooks.php
index 67f825f1bb..3071fdf603 100644
--- a/api/src/Hooks.php
+++ b/api/src/Hooks.php
@@ -284,7 +284,7 @@ class Hooks
 	 */
 	public static function pgp_encryption_menu($appname)
 	{
-		if (Header\UserAgent::mobile()) return;
+		if (Header\UserAgent::mobile() || $GLOBALS['egw_info']['server']['disable_pgp_encryption']) return;
 
 		// PGP Encryption (Mailvelope plugin) restore/backup menu
 		$file = Array(
diff --git a/infolog/inc/class.infolog_ui.inc.php b/infolog/inc/class.infolog_ui.inc.php
index a7a4025c2f..2069778f3e 100644
--- a/infolog/inc/class.infolog_ui.inc.php
+++ b/infolog/inc/class.infolog_ui.inc.php
@@ -2271,10 +2271,14 @@ class infolog_ui
 		{
 			$sel_options['action']['schedule'] = array('label' => 'Schedule', 'title' => 'Schedule appointment');
 		}
-		if ($GLOBALS['egw_info']['user']['apps']['stylite'])
+		if ($GLOBALS['egw_info']['user']['apps']['stylite'] && !$GLOBALS['egw_info']['server']['disable_pgp_encryption'])
 		{
 			$content['encryption_ts'] = filemtime(EGW_SERVER_ROOT.'/stylite/js/infolog-encryption.js');
 		}
+		elseif ($GLOBALS['egw_info']['server']['disable_pgp_encryption'])
+		{
+			$readonlys['encrypt'] = true;
+		}
 		$GLOBALS['egw_info']['flags']['app_header'] = lang('InfoLog').' - '.
 			($content['status_only'] ? lang('Edit Status') : lang('Edit'));
 		$GLOBALS['egw_info']['flags']['params']['manual'] = array('page' => ($info_id ? 'ManualInfologEdit' : 'ManualInfologAdd'));
diff --git a/mail/inc/class.mail_compose.inc.php b/mail/inc/class.mail_compose.inc.php
index da1c3b7a97..ffb45b609c 100644
--- a/mail/inc/class.mail_compose.inc.php
+++ b/mail/inc/class.mail_compose.inc.php
@@ -271,6 +271,7 @@ class mail_compose
 			}
 			unset($actions['pgp']);
 		}
+		if ($GLOBALS['egw_info']['server']['disable_pgp_encryption']) unset($actions['pgp']);
 		// remove vfs actions if the user has no run access to filemanager
 		if (!$GLOBALS['egw_info']['user']['apps']['filemanager'])
 		{