Please help us to help you:
How are you accessing your email accounts? Is it through a 'proper' email client (such as Outlook Express, Windows Live Mail or Thunderbird) or using webmail (using your web browser, such as Internet Explorer, Chrome, Firefox or Safari). If it's the latter, which browser are you using? Is your email client (or browser) set to log in automatically to your email providers, or do you have to enter a username and password every time? Can we assume that you're using a Windows PC or are you, in fact, using an Android phone/tablet or an iPad?