Email sent but not recieved at destination

I installed it, as a test email I sent email to my Hotmail , it shows sent and it is in my sent email folder but I did not received the email at Hotmail. I tried for gmail but same story…
I use pop server and official domain… any solution?

are there any errors in Tools>Operations>Error window?
Can you try to send another message and then go to Tools>Operations>Log section and copy the content of this window here?