ssl false with port 465 does not throw exception for server smtp.gmail.com

I am trying to connect to my gmail account using com.sun.mail ..... Mail api. I am using mail api version 1.4.2 - mail_1.4.2.jar Now I am trying to connect with following details as :

username : username@gmail.com
password : some password (correct password)
host : smtp.gmail.com
port : 465
SSL : false

But when I try to execute Transport.connect(host,port,username,password), it just开发者_开发知识库 hangs -- no error return, no exception. Please help me out as if SSL is no then it should prompt me some error.

I am able to connect with SSl as true and rest of the configurations are same as above.

SSMTP is typically on port 465.

SMTP is typically on port 25.

Try again, but use port : 25. Google might enforce TLS/SSL on 465.