Blocked messages in Postal Queue

Hi, this is my first topic, after installing my SMTP server (postal) using inGuide guide, I queued the Mautic to send in specific time zone using my postal SMTP credential, but when it come a time all messages become stuck in the queue,

I check the postal status below:

  Name                     Command               State    Ports

postal_cron_1 / post … Up
postal_requeuer_1 / post … Exit 1
postal_smtp_1 / post … Up
postal_web_1 / post … Up
postal_worker_1 / post … Exit 1

and my postal dashboard as below :
queued message in postal

Thanks for help