NOTE: You need an SMTP server that accepts TLS or SSL only

1. Specify the full SMTP hostname:port in "Site administration -> Server -> Email -> Outgoing mail configuration" e.g.: smtp.gmail.com:587
2. Set SMTP security to TLS or SSL (depending on SMTP server) e.g: TLS
3. Set other fields if necessary, e.g.: Google SMTP Server:
   • SMTP Auth Type: LOGIN
   • SMTP username: <youremail>@gmail.com
   • SMTP password: <yourpassword>
     • Attention if you use 2-factor authentication you must generate an "App password" and provide this as password
4. Send a test message to check outgoing mail configuration in "Site administration -> Server -> Email -> Test outgoing mail configuration"
5. Open up /login/forgot_password.php in browser and trigger a password reset email
6. Ensure mail is sent properly