One way that old school anime fans shared information with each other was through text files that were distributed across various bulletin boards. Anime Stuff, first published by Tom Mitchell in January of 1987, was one of the most well-known newsletters. Tom was a sysop of "The CompuServe Anime & Manga Forum". Starting with issue #5 (11/12/1987), none other than CJAS co-founder and first president Masaki Takai joined Tom in producing the newsletter. Masaki, then a freshman at Cornell, hadn't even started CJAS yet (the club was "born" on September 9th, 1988).
Issues (with associated images) of Anime Stuff are still available for download at the SUNET FTP archive's mirror of the much-loved but now-defunct Venice anime and manga FTP archive: Index of /pub/comics/anime-manga/anime.stuff
An even more accessible collection of Anime Stuff can be found here: Index of /OSA/PUBLICATIONS/anime-stuff courtesy of J!-ENT's Old School Anime website, which is a pretty fun read if you were a fan from that time, or if you're interested in that particular era of fandom.
Years before the CJAS newsletter was started in 1992, Masaki was already contributing heavily to Anime Stuff. Search the following index to find the articles he submitted: asindex6.pdf
Some readers might be interested in the interviews with Roe Adams and Masaki, in issues 17 and 20 respectively, where they talk about the early days of CJAS and the founding of Animeigo.
Otaku no CJAS: Graffiti of the Otaku Generation 1988
10 Years of Decadence, CJAS-Style (another CJAS history article)