Send a File Attachment With Outlook.com
The size limit for attached files in Outlook.com is 20 MB. However, you can bypass that limit by sharing files as a OneDrive, Dropbox, or Google Drive attachment. Files from these cloud sharing services appear as a link in the message. Sharing files from a cloud service doesn’t use up your email storage and doesn’t take time to download these attachments in Outlook.
Identify Yourself and Alert Your Recipient About the File Attachment
Let your recipient know that you’re sending an email with an attachment so they don’t assume that it is a spam email. If you send the attachment to someone you don’t know well, give them enough information to verify your identity and tell them what is contained in the file. With some email systems, it’s easy to overlook attached files. This is another reason to be clear in your message that there’s a file attached. Mention its name, size, and what it contains. That way your recipient knows to look for the attachment and that it’s safe to open.
