Some of the pedagogical discussions on this network can be especially helpful. At least in the initial stages of its existence, it has seemed to have more of an archeological bent to its discussions. That does NOT mean all postings need be in the ealde spraec, but can be in modern English so long as they focus on the how to's of composing in Old English. If one has interests in this area, then one may wish to subscribe to it in addition to a related higher volume group like Ansax-l. HEL-L, a discussion group devoted to studies in the history of the English language, is primarily but not exclusively pedagogical.
Messages here are typically few and far between.
It is fairly active. Many of its postings are in Spanish. This can be a real help for, say, a Germanic scholar trying to follow a conversation quoting medieval Italian or for a Romanticist trying to decipher something from Old Norse. It does not have a high volume of postings. Of these related discussion groups, perhaps the one of most general interest would be the first one, Humanist.