L-Soft today announced released LISTSERV 15.0, a milestone version of the email list manager, featuring a completely redesigned Web interface, RSS support and new deliverability and performance features, such as rate limiting and background DomainKeys processing. LISTSERV 15.0 features site administration and list owner dashboards that provide at-a-glance summaries that make it simple to manage email lists and run the site from anywhere on the Internet. Site configuration changes can now be made on-the-fly directly through the Web interface. The software offers full interface customization, built-in virus protection, supports DomainKeys and includes a unique deliverability assessment, which analyzes LISTSERV and DNS configurations and gives concrete suggestions for improving deliverability. LISTSERV is available for all major operating systems, including Mac OS X. (Pricing not available.)