In my experience, the free version of Zoho's Email Hosting is not suitable for using a single mail account on multiple devices, as there seems to be limits on the amount of concurrent connections to the IMAP server. And therefore email fetching is not stable.
I am looking for a solution to operate the same email box and calendar, on at least three different devices.
Is this possible with Zoho, for example by upgrading to standard, pro, etc?
Please advice,
Thank you.