Capture and Send 1.5 is pretty ggod (not free - $15). You can also just google the subject and you will get a bunch of options
check out http://sourceforge.net/projects/phpmailer your developer will know what to do with it. However the CMS you end up choosing (see other threads) may have a mailer integrated in it so choose that first.
Swift is another good option you can consider, swift is a free feature-rich PHP Mailer, Early versions of Swift were comparable to PHPMailer. Swift has since evolved and matured into a fully-fledged object-oriented mailing solution. Compared with PHPMailer, the interface for Swift is both tighter and more intuitive. I genuinely belive that no other mailer comes close to Swift in terms of available features. Download link : www.techrelax.com
check out www.bannermailer.com, its really simple and has a very user friendly interface. Manages lists, Sends Emails, Tracks Statistics. Not Free It Runs At About $25.00 A Month. Well Worth The Price Check It Out.
Thanks imarket, i checked out there live demo online and this seems to be the best option for newsletter management & email marketing. Im going to switch right away, I would recomened you all check out there online demo or install a copy on your server for FREE. http://www.bannermailer.com/demo/admin/ the username is demo and password demo also