Office Help & Training
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Reduce the size of pictures and attachments in Outlook email messages
If you're concerned about the size of your email messages or if you've received a message that your email is too large to send, there are several steps you can take to reduce the size of the attached pictures and other documents.
Applies To:
Outlook for Microsoft 365, Outlook 2021, Outlook 2019, Outlook 2016, New Outlook for Windows