E-List Distributor for Mac is an application for sending personalized mass emails using templates. It makes it possible to communicate quickly and reliably with your customer base and subscribers and can automate tasks such as notifying subscribers about new products and promotions, mailing invoices and tracking numbers to online customers, and sending a daily or weekly newsletter to your subscribers. It can schedule mailings during the night to avoid overutilizing networks during business hours. Unsubscription and bounce processing allows you to comply with the CAN-SPAM act.
JaMailist is mailing list software that is simple and easy to use. It was produced as an add-on to JaMailer and works well with it, although it should be easy to configure to work with many different setups. It's designed so that a novice can have mailing list services running in seconds.
Xataface Email Module allows you to email to the results of any set found in a Xataface application. This allows you to easily convert your existing database of contacts into a mailing list. It supports HTML email, recipient opt-out, mailmerge macros, and more. The email is sent in the background via a cron script, so arbitrarily large email lists can be supported.