diff -urN ../postfixadmin-3.3.10.orig/model/MailboxHandler.php ./model/MailboxHandler.php
--- ../postfixadmin-3.3.10.orig/model/MailboxHandler.php	2021-08-17 17:08:20.000000000 +0300
+++ ./model/MailboxHandler.php	2021-11-15 21:26:47.780821252 +0200
@@ -41,7 +41,7 @@
             # read_from_db_postprocess() also sets 'quotabytes' for use in init()
             # TODO: read used quota from quota/quota2 table
             'active'           => pacol(1,          1,      1,      'bool', 'active'                        , ''                                 , 1 ),
-            'welcome_mail'     => pacol($this->new, $this->new, 0,  'bool', 'pCreate_mailbox_mail'          , ''                                 , 1,
+            'welcome_mail'     => pacol($this->new, $this->new, 0,  'bool', 'pCreate_mailbox_mail'          , ''                                 , 0,
                 /*options*/ array(),
                 /*not_in_db*/ 1             ),
             'phone'            => pacol(1,  $reset_by_sms,  0,      'text', 'pCreate_mailbox_phone'         , 'pCreate_mailbox_phone_desc'       , ''),