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Error message displays when sending an email
The following error message appears when sending an email: Error: 421 4.4.2 Message submission rate for this client has exceeded the configured limit.
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Error: 421 4.4.2 Message submission rate for this client has exceeded the configured limit
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See Exchange 2013 SMTP limits on the Microsoft Exchange User Forum for guidance. (© 2017, Microsoft Corporation, available at http://www.microsoft.com, obtained on August 16, 2017.)
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