Note from POP Peeper Help regarding attachments:
A signature can be added for all accounts or a different signature for each individual account (see below).PP Help on attachments wrote:Files can be attached to your outgoing email if you're using SMTP (attachments are not supported when sending via WebMail). To attach files, drag&drop files from Windows Explorer onto the Send Mail window, press the "Attach" toolbar button or use Insert / File attachment from the menu.
In "Tools" > "Options" > "Send mail" you will find a "signature" button to add a signature to all accounts (any accounts that do have its own signature will use this signature) or by editing each account individually (i.e. RIGHT-click on an account and select "Edit account"), select "Send mail" where you will find a "Signature" button for that specific individual account. (btw, there are other ways to edit accounts as well (i.e. select an account in the left account list pane and then from the main menu select "Accounts" > "Edit")