Zoho Desk - Emails not loading in portal and cant send email

Zoho Desk - Emails not loading in portal and cant send email

Hi,

At the moment we are having problems with incoming and outgoing mails.

When trying to open a ticket, we get an error 'Content not available'.
When trying to send an email we get the following message, Email reply failed from being sent! Momentary issues with the mail server, Try resending this email again.

Does anyone have a solution for me?

Thanks in advance