[Web] Add MAILBOX_DEFAULT_ATTRIBUTES variable to define default mailbox attributes

data/web/inc/vars.inc.php

@@ -123,3 +123,12 @@ $DOCKER_TIMEOUT = 60;
 
 // Anonymize IPs logged via UI
 $ANONYMIZE_IPS = true;
+
+// Force incoming TLS for new mailboxes by default
+$MAILBOX_DEFAULT_ATTRIBUTES['tls_enforce_in'] = false;
+
+// Force outgoing TLS for new mailboxes by default
+$MAILBOX_DEFAULT_ATTRIBUTES['tls_enforce_out'] = false;
+
+// Force password change on next login (only allows login to mailcow UI)
+$MAILBOX_DEFAULT_ATTRIBUTES['force_pw_update'] = false;