Hello, I hope you can help me. I set up a second e-mail account in Thunderbird, and wanted to make an Archive sub-folder. I right clicked my e-mail name and clicked "New Folder" in the drop-down (at least that's what I think I did), typed the name "Archive" and a new sub-folder was created. However, the folder icon looked different. It looked more like an envelope being opened. I didn't know why it looked different than all the other folders I have created before, so I thought I must have done something wrong. I right clicked the folder icon to delete it, but the delete and rename options were not there. I can't seem to find any information about this. Any help or advice would be appreciated. Thank you.