My account blocked for sending message

My account blocked for sending message

Hello Sir/Ma,

Kindly help me unblock the email and reason for blocking has been noticed and will not happen again

We have blocked your account "gemmell.davidson@mebwails.com" temporarily as a security precaution.

Block Type: Mail Outgoing blocked. Reason : Unknown


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User :  gemmell.davidson@mebwails.com  
Details :Mail Outgoing blocked. Reason :Mail rate exceeded limit