Thanks for responding. I had earlier enabled the SMPT and autoresponse is working fine with SMPT. Now, I have also enabled IMAP in the OsTicket setings but that is not fetching the mails at all.My server has limited Cron support, so cannot use Cron.Moreover, to setup email piping is much simpler.On testing I found that this problem is there in versions 1.8 and above. Also, on clicking on the ticket attachment, the attachment does not download like it used to in versions 1.7 and earlier but they open up in the browser. That will mean extra work for the staff.I wonder if I have to use the version 1.7 instead of higher versions because version 1.7 is not having these problems.