[Snowtractor]

can you go to your server and access your mail. My company has virtual mail . I go to the company's main page and on it they have a link or sign in to mail . Using my name and password I can sign in and use their system to open and manage my mail. This way you can see if an extra large file is blocking the works. You can also go in to the properties of your mail and see if the download file size is set too small to accept a file sitting at your main server.
Are you timing out? Do you have high speed? Have the settings for recieving mail been messed with, can't hurt to look. Can you send mail?
Ulitimately if everthing doesn't work you may have to remove and reload your mail program.
Sean