Open the address book window From the Menu Bar select Tools-Export Select where you want to save the file, the file type and a name for the file.

I am sure Outlook Express has a procedure for importing the file. Be sure you know what file type OE will be looking for so you export it in the correct format.

Thunderbird doesn't have "Send to" slot. Thanks anyway.

No idea what you are talking about or how Sent To fits in the above instructions, but your welcome.