Delete unwanted mail in the server, without downloading it, using MailWasher
MailWasher deletes unwanted e-mails before you download them to your computer.
You’ll be able to see who the email is from, the subject, and the attachment. This will enable you to decide if you want to delete the email or keep it.
With MailWasher you can also bounce back unwanted e-mails so it looks as if your email address is not valid. This will make the sender think your address is no longer active so your name might be removed from their list.
Please note that the free version of MailWasher works with only one mail account.
* Check also this guide on defeating spammers: The definitive solution against junk mail!.