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Outlook - Attachment and Recipient Limits

This document details the size limits for UW-Green Bay emails and the maximum number of recipients.

Related KBs
Outlook - Checking Storage Space
Outlook - Forward an Email as an Attachment


The maximum number of recipients is 249.

These are the email size restrictions:

  • 25 MB external email to an internal email. 

  • 25 MB internal email to an external email. 

  • 50 MB, in theory, from internal email to another internal email.  

    • Don't expect 50 MB all the time. If an email between 25 MB and 50 MB isn't sending, use OneDrive to share attachment/email.

***NOTE: Please keep in mind external email hosts may have their own email size limits lower than ours.***




Keywords:attachment size limit outlook email recipient   Doc ID:48525
Owner:Kris C.Group:UW Green Bay
Created:2015-03-09 08:34 CSTUpdated:2022-12-06 14:49 CST
Sites:UW Green Bay
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