MailConnectException: Couldn't connect to host, port: smtp.sendgrid.net

Question

I have created API key for sendGrid:

I have following spring mail configuration:

spring.mail.default-encoding=UTF-8
spring.mail.host=smtp.se         


        

Answer 1

You may need add something like this to your configuration.

spring.mail.smtp.ssl.enable=true

Answer 2

There is a probability that SendGrid SMTP servers are not discoverable in your country. try a proxy or VPN.

Answer 3

I used the port 2525 (Non-privileged) instead of 578 (privileged) to solve the problem locally. I can still use the privileged one on the cloud. That solved my problem.