Could not connect to SMTP host: smtp.gmail.com, port: 465, response: -1

Question

while sending mail I am getting this error

java.lang.RuntimeException: javax.mail.SendFailedException: Sending failed; nested exception is: cla

Answer 1

In my case it was Avast Antivirus interfering with the connection. Actions to disable this feature: Avast -> Settings-> Components -> Mail Shield (Customize) -> SSL scanning -> uncheck "Scan SSL connections".