we have addressed authentication issue with POP and IMAP with all of our email addresses in our company. I tried to disable MFA, I tried to use different clients (Mail app from Apple, Microsoft Outlook), but without any success. This problem appeared 2 days ago and until then we are able to login sometimes, but only for a few minutes, then the problem appears again. Are there any problems on Zoho side or can you help me fix this issue?

Thanks a lot,

David