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• comp.mail.eudora (category)
• comp.mail.headers (newsgroup)
• comp.mail.imap (newsgroup)
• comp.mail.list-admin (category)
• comp.mail.maps (newsgroup)
• comp.mail.mh (newsgroup)
• comp.mail.mime (newsgroup)
• comp.mail.misc (newsgroup)
• comp.mail.multi-media (newsgroup)
• comp.mail.mush (newsgroup)
• comp.mail.pine (newsgroup)
• comp.mail.sendmail (newsgroup)
• comp.mail.smail (newsgroup)
• comp.mail.uucp (newsgroup)
• comp.mail.zmail (newsgroup)