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Home > Success Center > Web Help Desk (WHD) > WHD - Knowledgebase Articles > Error message displays when sending an email

Error message displays when sending an email

Overview

When you send an email, the following error displays:

Error: 421 4.4.2 Message submission rate for this client has exceeded the configured limit

Environment

All Web Help Desk versions

Cause

There is a limitation the Web Help Desk mailbox account. This error displays when Web Help Desk sends bulk emails at the same time, which is five emails by default.

Resolution

See Exchange 2013 SMTP limits on the Microsoft Exchange User Forum for guidance. 

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