Being throttled by Messagelabs Server

I need a solution

Hi Support throttling our mail servers.

We had issues on our mail queues and once we resolved it, a lot of mails were sent in the queues. Subsequently we are now being throttled. I have mailed, called Symantec Support to no avail. Please assist us urgently.

Date Received: 2019/03/25 13:56:19

Expiration Time: 2019/03/27 13:56:19

Last Error: 421 Service Temporarily Unavailable External MX record External MX record External MX record

Kind Regards




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