Can you please provide more information?
SMTP log would be useful. What kind of load do you have on the server?
I have had this message once sending e-mails whiling having 3G mobile internet connection.

Regards
Alex



On 16/04/2010 11:36, Amit Dalia wrote:Dear All,

From morning onwards I'm getting below error:

*ERROR:*Message not sent. Server replied: Service not available, closing channel
421 Timeout. Talk faster next time.

Any update on why this is occuring?

Thanks and regards,

Amit

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