Creating a “Today” Smart Mail Filter
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If you use Opera Mail (M2), go to Mail item in the main menu and choose “Filters…”
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Then click on the “New Filter” button in the top left corner.
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Set a name for the filter. As we’re going to create a filter for today’s e-mails only, “Today” seems to be logical.
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Under “Match” choose “Any Header” from the first dropdown and enter your e-mail address in the text field to the right. You can click on “Apply Filter” then “Close”.
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All your messages will get filtered by this filter. However, we have one more step. Click on the filter in the Mail panel…
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Then click on the View button in the toolbar, choose Period -> Today and you’re done.