I am suing my symfony2 project and sending spool messages with this command:
php /var/www/myproject/app/console swiftmailer:spool:send --env=prod
This works for PHP 5.3 but not for PHP5.5
In the 5.5, only the email to my local domain are send and not outside ones, For 5.3, everything works fine.
Did you encountered this problem? Any idea why`?