iCloud: Add an email attachment in Mail on iCloud.com
You can attach one or more files to a message.
If you want to attach files that are too large to send in email, you can use Mail Drop. Mail Drop uploads large attachments to iCloud, where they’re encrypted and stored for up to 30 days. For more information about Mail Drop limits and system requirements, see the Apple Support article Mail Drop limits.
Recipients can download Mail Drop attachments for 30 days after they’re sent.
Add an attachment
In Mail on iCloud.com, at the top of the message window, click the Attach button .
Select the files you want to attach, then click Choose (on a Mac) or Open (on a Windows computer) to begin uploading the files.
If your attachments are too large to send in email, you’re asked if you want to deliver the attachments using Mail Drop. If you agree and Mail Drop is turned on, the attachments are uploaded to iCloud.
It may take some time for the upload to complete, depending on the size of the files.
To attach more files, repeat steps 1 and 2.
You can also simply drag files into your message. If you use Internet Explorer 9, drag and drop requires an add-on and Mail Drop isn’t supported. See the Apple Support article About iCloud add-ons, extensions, and plug-ins for Windows browsers.
Remove an attachment
In Mail on iCloud.com, in the message window, hold the pointer above the attachment, then click the Remove icon next to the attachment’s filename.
You can only remove an attachment before you send the message.
Turn on Mail Drop for large attachments
If you want to use Mail Drop to deliver large attachments, make sure it’s selected in iCloud Mail preferences.
For information about including original attachments in a reply, see Reply to or forward email in Mail on iCloud.com.
You can’t remove files already sent with Mail Drop. They expire after 30 days.
Note: If you send an email with large attachments, it might be returned by the recipient’s email service if your email exceeds the size limit set by that email service. You can try sending the contents of your message in multiple messages, or using compression software, such as the Compress feature on a Mac, to make your attachments as small as possible.