yes, thats correct.

but what i'm asking is, when you are accessing sql server using sql server authentication. how to retrive domain user name which is logged on windows.

lets say, we...

Yes, outlook is updated.

I connect to the server through remote desktop, most of the work I do from remote desktop.

Yes, I can send and receive emails from outlook. Also the email that SQL server is configured can send and receive emails from outlook

Yes.

Every time after error message, I reboot the server computer, after that when I test it from the operator's property, it displays a message tellig that the message has been sent...

Hi, thanks for trying to help me.

First message is:

"This will send the message 'Microsoft SQL Enterprise Manager Alert Test notification - Please Ignore.' to the user or group with address...