Email not working and not pushing to phone since upgrading email service to 15GB.

Email not working and not pushing to phone since upgrading email service to 15GB.

Hi. I'm having problems since upgrading to 15GB email service.  Now can't send email and will not sync with android phone.

Get bounce report: 

Dear User, 

Your mail incoming is blocked for the following reason : 

Total incoming mail size exceeds limit 

------------------------------------------- 
This is an automated message, please do not reply to this mail - Zoho Mail Administration 

Are the upgrade and the issue linked, and can you help?

Thanks

Cameron.