Sub Liste()
Dim L%, listemail$
listemail = ""
For L = 11 To Range("J65500").End(xlUp).Row
If Rows(L).Hidden = False Then
listemail = listemail & Cells(L, "J") & ";"
End If
Next L
Cells(9, "J") = Left(listemail, Len(listemail) - 1): Cells(9, "J").Copy
End Sub