Cannot sent from new machine to old machine using same domain

I already use the free EmClient but I now want to instal it on my wife’s new machine too. Having done so, I find I cannot send mail from wife’s machine to my machine, the error message seems to be saying that I’m sending to and from the same domain. I can however, send for my machine and collect on her machine so it does work one way at least. I checked the SMTP settings numerous times but I cannot sort it. My wife’s machine is running Windows 8 RT. Everything else seems to be working OK except I cannot send via SMTP on her system to me.

OK solved it. I had been importing settings from Windows Live Mail but fixed it by entering settings manually.