The QmailToaster is an RPM-based Qmail distribution for CentOS, Fedora, SuSE, and Mandriva. This system is designed for ease of deployment and includes strong anti-spam systems. This includes support for SRS, SPF, DomainKeys, and virtual hosting on the SMTP side. On the user side, this has a Web-based administration interface and supports POP3, POP3 over SSL, IMAP, and IMAP over SSL.
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.
j-XChange is a pure Java implementation of the entire Collaboration Data Objects (CDO 1.21) library for accessing Microsoft Exchange Server in a platform independent manner. This library will allow interoperability with MS Exchange from all non-Windows platforms that support Java. This library is powered by j-Interop.
Gutuma is a feature rich PHP newsletter/mailing list management tool that is designed to be easy to install and use. It doesn't require a database, yet offers multiple lists, import and export from CSV, file attachments, drafts, AJAX subscribe gadgets, administrator email notifications, MD5 protected logins, and batched deliveries that can be driven by a cron job.
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.
The Simple Mail Distributor is an Email::Filter-based Perl script which can be used to implement an administratively-managed mailing list. The service can be restricted to a list of allowed senders. Each message is sent individually with the To header adjusted to match the recipient.