Synchronization issues with msync.zoho

Synchronization issues with msync.zoho

Hi,

I've had my email working fine on my Android phone for a long time, but in the last few weeks it's started to go a bit weird.

- all new messages are still being received fine
- messages deleted from the phone are deleted fine

- but messages deleted via the web or via Outlook/imap continue to show on the phone

I've deleted/recreated the account on the phone to no avail, and even tried it on a friend's iPhone where the same problem was observed, so that points at the issue perhaps being with the EAS server?

The only major change I can think of relating to my domain was fixing the DKIM settings recently, but this sync issue may have been happening even before then. Can't see how they'd be related anyway...

Any thoughts?