Seeking recommendations for a reliable, accessible platform to host a support/discussion email list/listserv/snapshot of the 90's with around 1000 members. We're with GroupsIO right now but I'm tired of their in-browser inaccessibility. Cheap would be brilliant as my group doesn't directly make money, can pay something for solid service, accessibility and responsive support though.
I probably don't fancy self-hosting this much traffic.
Boosts appreciated.