Hello,

I'm using Zoho now for some days after migrating to it from my ISP mail. 

Unfortunately, I experience a massively slow sync with IMAP since the change.

I use on my laptop Thunderbird and on my smartphone (Android) AquaMail. AquaMail shows me at every sync how long it took. With my old mailbox from my ISP I had a sync under 0,2s, but now with Zoho, it sometimes even took 13 seconds to synchronize, same with Thunderbird. It feels slow and sluggish, sending takes like 20 seconds.