I have an outlook.com account. My address is on a mailing list. When I reply to a message sent out on the mailing list, I receive the message I sent, so it looks like there are two of the same messages in the conversation thread, the one I sent, and then the one that is relayed back. Gmail does not do this. When I send a response to a mailing list via gmail, it doesn't not relay the message back to me. It simply puts the message in sent items like normal and there is only one copy of the message in the conversation thread. How do I get rid of this issue?