May First is Now a Coop
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Photo by Rhododendrites - Own work, CC BY-SA 4.0, Link

Members

May First offers two different webmail programs. You will always see the same email regarless of which program you use. Roundcube has a friendly and simple iterface, making it the easier of the two programs to use. Horde, on the other hand, offers more than just email - you can share calendars, to do lists and more with other members of your group. Feel free to try both and decide which one makes sense for you.