Mailing list

Hi, I’m looking for an easy to use/plugin for wordpress to create a listserv. I’m not very tech savvy, so it would need to be fairly easy to install and operate. I’ve seen some mailing lists but they seem to be only 1 way. I’m looking for something more like a listserv where users can send emails to each other en mass, rather than individually. Does anyone know of something that would work for me?

Thanks much!