No access to emails from Iphone and macbook

No access to emails from Iphone and macbook

Hi

Since last Tuesday i have no access to emails on the Zoho server from my Iphone and macbook. Both devices keep trying to connect but every time it comes back indicating the message password or username is incorrect which is not the case. I have also deteted the mail account and reestablished on the devices and no change.

Any suggestions

Mark