I have setup POP3 access in my Zoho mail account to be pulled from GMail. Today, GMail is unable to pull from the POP servers on Zoho and this is the error message: "Server returned error "Bad msg size: 4 -1". This was previously working but now nothing is coming through.

The POP3 section within GMail settings is notifying my this way:
"Error reading mail. Mail cannot be retrieved from this account at this time."

This is my business email and would like some assistance to get this active. Already had issues with SMTP being blocked from our normal emails which I was told was fixed. Now this... Please help.