sending a mailing creating multiple send receipts

Hello,

I am asking you first, because you are much easier to deal with than the Support Ticket people at my email hosting.

I have just sent out a mailing using PowerMessenger, and for the first time ever, I got in my Send folder a copy and so receipt for every single individual mailing that went out on the list.

This has never happened before, and so I suspect that it's something occurring at the email host, rather than anything in PowerMessenger itself. I of course do not see anything in the settings dialogue box and options that would account for this behaviour.

I will leave the PowerMessenger location and credentials in the private area in case examining those will reveal any information.

Thank you