IMAP IDLE No Longer Supported?

I recently moved a couple of domains from Google Apps back to DH. Mail works fine, but IMAP IDLE seems to not be working. I’ve tried multiple clients on multiple machines. In every case I have IMAP IDLE selected, but the only way I can seem to download new messages is either manually or when the fetch interval expires in the client. Everything I read says that IMAP IDLE is now supported and I seem to recall not having any issues a year or two ago. Has something changed somewhere? BTW, my mail server is Thanks!

Scott Blystone
Rochester, NY, US

If you could email our tech support team with these specifics, we’ll get right on it and investigate more thoroughly: Thanks so much!