Important Email Lost
Hi,
I have some how lost an important email so it must have got deleted is there any way I have get it back
When using mail on iCloud.com you can search for messages containing specific text.
- In the sidebar, click the item (the Inbox or a folder, for example) you want to search.
- Click Search Inbox above the message list, type the text you want to find, then select the field you want to search in.
To exit the search and see all messages again, click the Delete button 
in the search field.
Also read these articles iCloud: Delete emails in iCloud Mail
You can also search mails in archive folder iCloud: Archive emails in iCloud Mail