JISCMail is a national academic mailing list service in the UK that allows users to create, build, and manage opt-in mailing lists to reduce isolation, share best practices, and engage communities. It provides a newsletter tool called LISTSERV that allows users to easily create professional-looking newsletters without coding through templates and a five-step process. Good aspects of LISTSERV include a ready-made audience, no technical skills required, templates, and customization options, while potential downsides include needing HTML knowledge for customization and storing images externally.