Error Data Size Limit Exceeded during email submission

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Article ID: 170190

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Updated On:

Products

Email Security.cloud Email Threat Detection and Response

Issue/Introduction

One or more users are unable to submit false negative emails using the Outlook email submission add-in.

ErrorDataSizeLimitExceeded

Cause

The Outlook submission add-in sends a request to Exchange Web Services (EWS) to get the base64 encoded email content. However, if the EWS response is greater than 1 Megabyte, the email content would not be retrieved due to the size limitation.

The size limit applies to Exchange 2013, 2016 on-prem solutions. There is no limit when submitting on a hybrid environment with Office 365, standalone Office 365 or Exchange Online.

For more information about these type of EWS errors, see EWS Response Codes.

Environment

  • Email Security.cloud
  • Outlook Email Submission add-in
  • Exchange 2013
  • Exchange 2016
     

Resolution

If the false negative emails cannot be submitted using the Outlook email submission add-in, these emails would need to be reported manually.

Submit false positives for legitimate email flagged as spam

Submit false negatives for email not flagged as a threat