O.k. Upgraded in steps from 1.6ST to 1.7 to 1.8-git to 1.9.5.1But in 1.9.5.1 getting error of duplicate attachment in tickets with Gmail especially (might be with other mails as well) (see this thread - http://forum.osticket.com/d/discussion//why-tickets-are-having-duplicate-attachments)No one has responded to this yet though. I might have to downgrade it seems.Another issue which I am receiving (again with Gmail) is that the users are not getting autoresponse outgoing mails even though I tested the outgoing setting with the setup provided. There were no errors during upgrade even.I am linking the webmail with Osticket via piping., Mail Sending in settings is showing via PHP mail function, Php version is 5.4.35 , Mysql version is 5.5.40 , Operating system is Windows 7