When mail gets deleted from your server
If you have a POP3 account
When Spamfire identifies a spam message on your server, Spamfire removes the message from your server and stores it locally in the Mail Window. When you see a spam message in the Mail Window, that message has already been removed from your server. If Spamfire made a mistake, you can rescue the message to send it back to your mail server for pickup by your regular email program.
When Spamfire identifies a good message on your server, it will store a copy locally (if set to do so in Extra Preferences), but it will leave the message on the mail server. Then, your regular email program can download and delete the message.
If you have an IMAP or Hotmail account
When Spamfire identifies a spam message on your server, Spamfire moves the message out of the server's in-box and into a mail folder called "Spamfire." Spamfire does not automatically delete the message. Spamfire then stores a copy locally in the Mail Window. When you rescue a message, Spamfire will find the message in the server's Spamfire folder and move it back into your in-box. If Spamfire cannot locate the message online, Spamfire will send it back to the server using your SMTP server.
Spamfire will also store copies of good messages (if set to do so in Extra Preferences) and Spamfire leaves the good messages in the in-box on your server.
When you delete a message from the Spamfire Mail Window, only the local copy is deleted. Spamfire never actually deletes any message, whether spam or not, on your mail server. You can use your regular email program to periodically delete the contents of the online Spamfire folder.