Hi,
I can see this from log:
```
2018-05-08 11:33:30,040 ERROR [qtp985655350-73] [org.xdi.service.MailService] (MailService.java:105) - Failed to send message
javax.mail.AuthenticationFailedException: 535 Authentication failed: Bad username / password
```
This kind of issue is out of scope with the support portal.
SMTP configuration is no out business, same thing for gluu customization.
Thanks,
Gasmyr.