Sigo los pasos de los videos para conectar amazon ses con mautic pero cuando hago la prueba de conexcion me salta el siguiente error:

Connection could not be established with host email-smtp.eu-west-1.amazonaws.com [Connection refused #111] Log data: ++ Starting Mautic\EmailBundle\Swiftmailer\Transport\AmazonTransport !! Connection could not be established with host email-smtp.eu-west-1.amazonaws.com [Connection refused #111] (code: 0)
++ Starting Mautic\EmailBundle\Swiftmailer\Transport\AmazonTransport

He investigado pero no se como solucionarlo