Email Attachment Sizes

Any mail sent or received bigger than your size assigned for your plan will not be delivered to the other end.
The quotas are as follows:
– Pro Plan 35MB
– business Plan 20MB
– startup 10MB
Please Note: when you send an email message that is bigger than you’re assigned for your plan from external email to WorldPosta, you won’t receive a notification.
But if you send from WorldPosta to a recipient in WorldPosta, you will receive a notification for the error.

solution:

You must upgrade your plan to be able to send and receive bigger messages size.