Thanks for your feedback. We are using LinkedIn authentication, to ensure that the content and discussion in the site will be professional. We do not intend t

Thanks for your feedback. We are using LinkedIn authentication, to ensure that the content and discussion in the site will be professional. We do not intend to send any unnecessary email to any of our users. I hate getting spam and I do not want to spam my users. We have set up the site, so that users have to opt-in for us to send any news-letter etc. They can choose to receive news-letter by going to their 'Settings' page. When users form private groups, groups members will be notified via email. This is the only occasion when we send email to users. Also, you do not have to login to view the content or read the discussion. However, you need to login to upload content, participate in discussion, form private groups etc.