I like to send notification emails with spring-boot-admin-server. I have configured it as described here:
http://codecentric.github.io/spring-boot-admin/1.3.0/#mail-notifications
However, I do not know how the SMTP is to be used. I think all of them (gmail, gmx,...) require some sort of authentication, isn't it? How can I provide the authentication? Or is the idea that you set up your own SMTP server without any authentication?