6.4.13.7 Article identification

Articles are stored in the cur/ subdirectory of each maildir. Each article file is named like uniq:info, where uniq contains no colons. nnmaildir ignores, but preserves, the :info part. (Other maildir readers typically use this part of the filename to store marks.) The uniq part uniquely identifies the article, and is used in various places in the .nnmaildir/ subdirectory of the maildir to store information about the corresponding article. The full pathname of an article is available in the variable nnmaildir-article-file-name after you request the article in the summary buffer.