http://kb.mozillazine.org/Disappearing_mail

have tried several suggestions I found online

It would be more useful if you could state what you tried exactly.

Chris, I have tried all the suggestions on the following link

http://kb.mozillazine.org/Disappearing_mail

which included 'repair folder' 'check settings'

I was unable to understand where the folders would be located

They are all visible and I can receive emails but they only stay on there for a short while & disappear - my settings seem to be correct as far as I can tell and I have used this program for several years without incident

thanks for your reply

Liz

I was unable to understand where the folders would be located

Can you explain that in more detail? What folders?

They are all visible and I can receive emails but they only stay on there for a short while & disappear

You really need to give precise information. 'They are all visible' - what is visible? Messages? Folders?

they only stay on there

Presumably messages. They stay where?

Please post your Troubleshooting Information. At the top right of the Thunderbird window, click the menu button , then select Help > Troubleshooting Information. Press the "Copy text to clipboard button" and paste the information into your reply.