What kind of error message you get. We have sent with tens of thousands without any errors. However in you have a very large list, it is better to use desktop bulk mailer program to get more control over your list.
even at a thousand emails it opens the new page as usual and it stay's blank. And hangs blank although it looks like the page is gonna load. After a couple of minutes it say's page cannot be displayed. It works perfect for less emails... I'm just wondering if it's my browser. Is there someway I can check my last mass email stats.
Make sure the program file permissions is set to 755, executables and per path is set for it like all other .cgi files. If it does not send emails at even small size lists, then this is the problem. Try to send to just few emails and see if it works or not, if not then it is the above permissions issue. The file I mean is: