Bonita Server 7.2.4 SMTP Connector error

Problem with smt connector in Bonita Server, logs show the following exception:

org.bonitasoft.engine.connector.exception.SConnectorException: java.util.concurrent.ExecutionException: org.bonitasoft.engine.connector.exception.SConnectorException: org.bonitasoft.engine.connector.ConnectorException: javax.mail.MessagingException: IOException while sending message;
nested exception is:
javax.activation.UnsupportedDataTypeException: no object DCH for MIME type multipart/mixed;
boundary=“----=_Part_196_1883361073.1508164774260"”
org.bonitasoft.engine.core.connector.exception.SConnectorException: PROCESS_DEFINITION_ID=9007442057029405375 | PROCESS_NAME=Solicitud de Vacaciones | PROCESS_VERSION=2.1 | PROCESS_INSTANCE_ID=6102 | ROOT_PROCESS_INSTANCE_ID=6102 | FLOW_NODE_DEFINITION_ID=8551150831758786116 | FLOW_NODE_INSTANCE_ID=181835 | FLOW_NODE_NAME=Notificacion al Supervisor | CONNECTOR_IMPLEMENTATION_CLASS_NAME=notSolicitud | CONNECTOR_INSTANCE_ID=180620 | org.bonitasoft.engine.connector.exception.SConnectorException: java.util.concurrent.ExecutionException: org.bonitasoft.engine.connector.exception.SConnectorException: org.bonitasoft.engine.connector.ConnectorException: javax.mail.MessagingException: IOException while sending message;
nested exception is:
javax.activation.UnsupportedDataTypeException: no object DCH for MIME type multipart/mixed;
boundary=“----=_Part_196_1883361073.1508164774260”
at org.bonitasoft.engine.core.connector.impl.ConnectorServiceImpl.executeConnectorInClassloader(ConnectorServiceImpl.java:274)
at org.bonitasoft.engine.core.connector.impl.ConnectorServiceImpl.executeConnector(ConnectorServiceImpl.java:147)
at org.bonitasoft.engine.connector.ConnectorServiceDecorator.executeConnector(ConnectorServiceDecorator.java:114)
at org.bonitasoft.engine.execution.work.ExecuteConnectorWork.work(ExecuteConnectorWork.java:138)
at org.bonitasoft.engine.execution.work.failurewrapping.TxInHandleFailureWrappingWork.work(TxInHandleFailureWrappingWork.java:42)
at org.bonitasoft.engine.execution.work.failurewrapping.TxInHandleFailureWrappingWork.work(TxInHandleFailureWrappingWork.java:42)
at org.bonitasoft.engine.execution.work.failurewrapping.TxInHandleFailureWrappingWork.work(TxInHandleFailureWrappingWork.java:42)
at org.bonitasoft.engine.execution.work.failurewrapping.TxInHandleFailureWrappingWork.work(TxInHandleFailureWrappingWork.java:42)
at org.bonitasoft.engine.execution.work.FailureHandlingBonitaWork.work(FailureHandlingBonitaWork.java:66)
at org.bonitasoft.engine.work.BonitaWork.run(BonitaWork.java:56)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

I cant reproduce the error in my studio, anyone know how to resolve this problem?

Thanks in advance,