Unable to send emails using tSendMail : Unknown SMTP host

[INESBK]

Hello,
I am trying to send a mail to gmail by using the 'tSendMail' component but i get this error : 

Exception in component tSendMail_1
javax.mail.MessagingException: Unknown SMTP host: smtp.gmail.com;
nested exception is:
java.net.UnknownHostException: smtp.gmail.com
at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1280)
at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:370)
at javax.mail.Service.connect(Service.java:297)
at javax.mail.Service.connect(Service.java:156)
at javax.mail.Service.connect(Service.java:105)
at javax.mail.Transport.send0(Transport.java:168)
at javax.mail.Transport.send(Transport.java:98)
at

Best regards.

[Anonymous]

Refer to the below page, the port is 587, and try to uncheck 'SSL Support' option.
https://www.hesk.com/knowledgebase/?article=72