Go to Audience > Segments.

If you're creating a new segment, select NEW SEGMENT. To edit an existing segment, select the Edit icon for the segment you want to modify.

Drag the Replies block onto the canvas.
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Select Replied to any campaigns they were sent.

In the Options for 'replies' popover, expand the first drop-down menu and select Email.

Expand the second drop-down menu and choose from:

If you chose an option relating to specific campaigns, select the check boxes for the email campaigns you want to include in your rule.

Expand the Date drop-down menu and set your date parameters.

Select OK.

Select SAVE to generate your segment.