connection timeout

Hello,

I am trying to send messages via zoho smtp client using spring boot. using the following configuration. I have tested my setup with gmail and it works fine.

spring.mail.host=smtp.zoho.com
spring.mail.port=465
spring.mail.username=noreplay@...
spring.mail.password=
spring.mail.properties.mail.smtp.socketFactory.class=javax.net.ssl.SSLSocketFactory
spring.mail.properties.mail.smtp.socketFactory.fallback=false
spring.mail.properties.mail.smtp.startssl.enable=true
spring.mail.properties.mail.smtp.socketFactory.port=465
spring.mail.properties.mail.smtp.debug=true

I get this error message

springframework.mail.MailSendException: Mail server connection failed; nested exception is com.sun.mail.util.MailConnectException: Couldn't connect to host, port: smtp.zoho.com, 465; timeout -1;
nested exception is:
java.net.ConnectException: Connection timed out: connect. Failed messages: com.sun.mail.util.MailConnectException: Couldn't connect to host, port: smtp.zoho.com, 465; timeout -1;