The SMTP server requires a secure connection or the client was not authenticated
Deploying BTS using a secure SMTP server. Be sure to also enter the correct server name, port and user name/password as required according to your local SMTP server requirements in the "Specify E-mail Server" step of the deployment wizard.
1. Go to the emailService web.config file (this can be done by going to the IIS and right clicking on EmailService and then explore)
2. Add the following new key in the <appSettings> section:
<add key="enableSsl" value="True" />
3. Save the configuration and rerun the deployment wizard