My Galaxy smartphone alerts me to incoming emails which have arrived on my laptop. If I use the smartphone to send an immediate reply, the recipient gets this reply as normal, but then it bounces back to my sent box on the laptop, appearing as an email sent every few minutes, perpetually. I detected this phenomenon after sending four reply emails via smartphone, then spotted that they were repeating in my sent box. I've tried all sorts of ways to disable the repeat, but only deleting them individually down the list is effective. Today I have 16600-plus sent messages in my sent box, all repeats of the same four originals.