Create your signature and save it. To use your signature, create a new message. Choose either Standard or Alternate from the drop-down list just above your message. Note that your signature is not displayed in the Eudora message window, but is added to the end of the message when it is sent. Organizing both your incoming and sent e-mails into folders and mailboxes helps tremendously.
Mailboxes go inside folders.
In the New Mailbox dialog box, type a name for the mailbox or folder. It a Folder. If you created a folder, Eudora redisplays the dialog box so you can create a mailbox inside the folder. You may need to drag a mailbox to the proper folder after you create it. In, Out, and Trash mailboxes.