Sender email address blocked

Sender email address blocked

I recently created a new account victoria.sangabriel@diveoztek.com.au and it worked well for a short period - but yesterday suddenly she cannot send mail without getting the following message:

unable-to-send-message-reason-554-5-1-8-sender-address-blocked-5-1-2016

I can see no reason for this but looking at the forum it is not the first time it has happened - I logged a support request but no response as yet.

Please can you urgently unblock this because she cannot work effectively if she can't send emails

Sue Crowe
Administrator@diveoztek.com.au