Redmine Email Configuration – Resolve Sending Email Notifications

I upgraded my Redmine installation after a while to 2.3.1 and I noticed email notifications weren’t being sent out. I tried to send a test email from “Administration => Settings => Email notifications” and received the following error message: An error occurred while sending mail (wrong argument (Fixnum)! (Expected kind of OpenSSL::SSL::SSLContext)) After trying different…