IIRC, Mailman uses mbox for its archives.
The release notes for 11.30 say:
The release notes for 11.30 say:
What will be the implications of this for Mailman on 11.32?cPanel & WHM 11.30 does not support mbox on Red Hat 6 or CentOS 6 servers.
Warning: In the forthcoming cPanel & WHM 11.32, the mbox format will not be supported on any operating system.