The official MEI mailing list, MEI-L, is used to inform the community about upcoming events, discuss possible improvements for MEI, evaluate encoding strategies and models, and get support from the full community.
The list is open to anyone for subscription, and everyone is welcome to join MEI-L by subscribing to: https://lists.uni-paderborn.de/mailman/listinfo/mei-l.
Also, the archives of the list are open to the public and can be browsed online: https://lists.uni-paderborn.de/pipermail/mei-l/.
MEI has a Slack channel that is used for discussion, questions, announcements, and collaboration, https://music-encoding.slack.com.
To join, please follow this link.
Slack has clients for Mac, PC, Linux, and mobile devices, and may be used via any web browser.
The Music Encoding Initiative group in the Humanities Commons is devoted to a discussion of topics related to music encoding, and is an extension of the Music Encoding Initiative channels on MEI-L and website. The Humanities Commons is a network for people working in the humanities. Connect with other scholars and their scholarship, and increase the impact of your work by sharing it in the repository. The MEI Group at the Humanities Commons can be accessed at https://hcommons.org/groups/music-encoding-initiative/.
You can also contact MEI by email.