Unable to send an email containing report Module 23 TestNg DataDiven Framework

Hi Ashishji, 
I am trying to implement the send an email functionality using the code provided. I am getting below error. How I can fix it. 


javax.mail.MessagingException: Could not connect to SMTP host: smtp.mail.yahoo.com, port: 25;
nested exception is:


I have attached the error log and code I have developed. Just FYI, I have commented XSLT report's code due I am not using. 
Please let me know what should I do. 

Thank You in advance
Kaivalya