Use a Countifs formula to put a count of how many times that particular email has repeated in the rows above the current row.
Formula: =ARRAYFORMULA(IF(A2:A<>"",COUNTIFS(A2:A,A2:A,ROW(A2:A),"<="&ROW(A2:A)),""))
Here replace A2:A with the column that has duplicate values and insert this in the 2nd row of a new column.
By this you will have a column which has numbers listed which represent how many times the duplicated value is seen before that row in the same sheet.
Then inside Glide use a filter to show only the rows which have this value as 1
Let me know if you need more clarity!