On Sat, Jan 12, 2019 at 10:44 AM Kunal Kumar <wolfbro92(a)gmail.com&gt; wrote: Those settings look insufficient given that Google SMTP server uses authentication, so you need to also supply a username and password. Also, port 587 is for STARTTLS, so you are required to enable that as well, but that's kind of irrelevant when you cannot supply auth details. to provide such settings through Keycloak's UI and use them when connecting to an SMTP server. You would have to implement your own EmailSenderProvider, and deploy this as a module, to send mails via Google's SMTP servers.