ATCards Artist Trading Card Forums
- A dedicated discussion board for Artist Trading Card enthusiasts where you can discuss ATCs, upload pictures, chat with members and set up trades.
- http://www.atcards.com/index.php

Artist Trading Cards at LiveJournal
- This online community is for the discussion of and exchange of Artist Trading Cards.
- http://community.livejournal.com/artist_cards/

All On The Outside
- This tribe is for the display, discussion and exchange of mailart.
- http://allontheoutside.tribe.net/

Yahoo! Groups : Artist Trading Cards
- One of the largest and most active artist trading card groups.
- http://groups.yahoo.com/group/artisttradingcards/

Mail Art Forums
- Messageboards about ongoing projects, shows and exchanging ideas and the art itself.
- http://mailartforums.crosses.net

Artistamp Mailing List
- A resource for people interested in discussing, trading, teaching and learning about the art of creating Artistamps.
- http://groups.yahoo.com/group/artistamp/

Mailart: Email Art Networking
- Email list about mail art and email art, with links and archives for non-members.
- http://groups.yahoo.com/group/mailart/

Mail Art Forum Journal
- Live Journal Community for those interested in mail art. Post images, mailart calls and network.
- http://www.livejournal.com/users/mailart