iCloud User Guide
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Welcome
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Messages
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More resources

Reply to or forward email in Mail on iCloud.com
Reply to or forward an email
In Mail on iCloud.com, select the message in your message list, then click
in the toolbar.
Do one of the following:
Reply to the message you are reading: choose Reply or Reply All.
Reply All sends your response to the sender and all the original recipients of the message.
Forward a message to one or more recipients: choose Forward, then type the email address(es).
You can also choose Forward as Attachment to have the original message attached as an EML file to the new message.
Include original attachments
You can include original attachments when replying to a message or forwarding it to a new recipient.
In Mail on iCloud.com, click
in the sidebar, then choose Preferences.
If you do not see the sidebar, see Show or hide the sidebar in Mail on iCloud.com.
Click Composing, select “Include original attachments in reply”, then click Done.