DECLARE @StartDate DATE = '20160101'
DECLARE @EndDate DATE = '20160531'
DECLARE @User NVARCHAR(128) = 'first.last@yourdomain.com'
SET @EndDate = DATEADD(day, 1, @EndDate);
PRINT @StartDate
PRINT @EndDate
SELECT t.LogDate AS [Time Stamp]
, t.Sender
, t.Subject
, t.Size
, r.Recipient
--, *
FROM Traffic t INNER JOIN MessageList m ON t.TrafficId = m.TrafficId
INNER JOIN RecipientList r ON m.RecipientListId = r.RecipientListId
WHERE t.[Sent] = 1
AND t.Sender = @User
AND t.LogDate >= @StartDate
AND t.LogDate < @EndDate
ORDER BY [Time Stamp]