421 4.7.0 too many errors;clossing connection

I have a problem with my email server, it is forwarding emails to a smarthost (fortimail 200D). I had problems with my mailbox server yesterday and when it came back online the smart host queue is stuck at retry and emails are not going out but we are receiving emails.
Helao MwapangashaData Centre: Server EngineerAsked:
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Simon Butler (Sembee)ConsultantCommented:
Restart the Transport Service on the server and see if that resolves the problem.
You could also consider restarting the smart host if you can, as it is rejecting the emails.

Helao MwapangashaData Centre: Server EngineerAuthor Commented:
Hi Simon

I did that already, I think the fortimail device might have a settings somewhere for the amount of allowed emails in a given time that my hub server violated.
Simon Butler (Sembee)ConsultantCommented:
I am not familiar with that appliance, so cannot help any further. You would need to speak to their support.


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