I downloaded Firefox 3.6.13 to my laptop and set up three email accounts: bellsouth.net (primary account), gmail.com (secondary) and yahoo.com. I replied to a message in my bellsouth account but when I clicked 'send' the reply went to the outbox folder and would not send. I closed the email and restarted the computer in an attempt to correct the problem. Now when I open the browser and click on 'mail', only the yahoo account is available. It seems the other accounts are still receiving messages because when I use IE to access the accounts they contain only messages received in the last hour.