<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type"> </head> <body bgcolor="#ffffff" text="#000000"> Thanks. I am going to try this. I have over 5 years of messages that I want to transfer. I'll let you know if it worked. Stéphane Anne Wilson wrote: <blockquote cite="mid200609130935.50150.cannewilson@tiscali.co.uk" type="cite"> <pre wrap="">On Wednesday 13 September 2006 03:16, Stéphane Bruno wrote: </pre> <blockquote type="cite"> <pre wrap="">If I already have mails in the new folder, will it not corrupt them ? </pre> </blockquote> <pre wrap="">I assume that you have a much larger number in the old folder? IIRC Thunderbird uses mbox format, where all the messages are in one large file. This is what I would do. Re-name the new folder by adding '.sav' on the filename. To be absolutely safe you may want to create a backup of the old one in the same way. Open both that file and the old one in your favourite text editor. Copy and paste the new file's contents to the end of the old one, and save the resulting text file to the place and filename that your 'new' folder had. Since you have not overwritten either the new or old folder's mail you can easily get back to where you were if it doesn't work, but I think it will. Anne </pre> </blockquote> </body> </html>