Some emails not received until 1 or 2 days later

Some emails not received until 1 or 2 days later

Hi

This has affected our email system with Zoho and several of our clients emails.

This has been happening for 2 days where some emails don't come through until a day or 2 later.

This happens even from emails sent internally from colleagues.

It is not ideal if we need to work in real-time, and the email system is not working properly.

Please can let me know if there is problem with the system and when it will be rectified

Thanks
Trevor