yMail is an advanced no-frills email client with powerful spam-deleting tools. It will give you control of your incoming mail with programmable spam filters, including bayesian filtering. It doesn't open or display attachments automatically, and is therefore much more secure than programs which do. It warns you if you try and open attachments, and refuses point-blank to run executable files. It won't render HTML emails, so it's proof against spam which runs off and loads web bugs when you preview it. (That's one trick they use to confirm your email address is valid). It also ignores receive notifications, javascript, vbscript and monkeyscript .....(free).....