$domain->config_backend = serialize($backendValues);
$domain->save();
- $mailingDomain = new CRM_Core_DAO_Preferences();
+ $sql = 'SELECT id, mailing_backend FROM civicrm_preferences';
+ $mailingDomain = CRM_Core_DAO::executeQuery($sql);
$mailingDomain->find(TRUE);
$mailingDomain->mailing_backend = serialize($mailerValues);
$mailingDomain->save();