My internet connection is working to capacity while "Mail" is open. Of course, it was loading all my mails when I used it the first time, but now all mails are on the machine and still "MagicanPaster" shows me that the internet connection is busy all the time while Mail is open. The settings are searching for new mails every 5 minutes. I am using OS.X 10.8.3.
Maybe my internet connection is just to slow, but is 400 KB/s for "Mail" not just too much? What options do I have to decrease the traffic?
Update: Even if I change the settings to "Searching for new mails every 15 minutes" the connenction is working still to capacity. Is it possible to set priorities for internet connection, so that I can use skype or facetime without lacking and still have mail in the background? Is anybody else experiencing the same problem?