Email servers usually restrict the size of attachments it will send or receive. If your messages with attachments fail to send or receive, it may be because the attachment is too large.
The size limit for attachments is 50 megabytes (MB) which may be too small for certain attachments.
There are a few things you can do to get your attachments sent:
- Share your document using Microsoft OneDrive instead of sending it as an attachment.
- "Zip" your attachment to reduce the file size.
- Split up the attachment(s) you want to send into multiple parts and send them in separate emails.
- For tips on shrinking powerpoint files see this kb How to Shrink Powerpoint files (for email)