TODO items for public-inbox (Not in any particular order, and performance, ease-of-setup, installation, maintainability, etc all need to be considered for everything we introduce) * general performance improvements, but without relying on XS or compiled code any more than we currently do. * mailmap support (same as git) for remapping expired email addresses * POP3 server, since some webmail providers support external POP3: https://public-inbox.org/meta/20160411034104.GA7817@dcvr.yhbt.net/ * TLS support for various daemons (including STARTTLS for NNTP and POP3) * Unix socket support for HTTP and POP3 server for use behind reverse proxies like nginx * Combined "super server" for NNTP/HTTP/POP3 to reduce memory overhead * Optional reply-to-list support for mirroring lists that want it :< Reply-to-list encourages the existing list as a single-point-of-failure, but having an extra mirror using public-inbox code is nice regardless. * Configurable linkification for per-inbox shorthands: "$gmane/123456" could be configured to expand to the appropriate link pointing to the gmane.org list archives, likewise "[Bug #123456]" could be configured to expand to point to some project's bug tracker at http://example.com/bug/123456 * Support optional "HTTPS Everywhere" for mapping old HTTP to HTTPS links if (and only if) the user wants to use HTTPS. We may also be able to configure redirects for expired URLs. Note: message bodies rendered as HTML themselves must NOT change, the links should point to an anchor tag within the same page, instead; giving the user options. * implement RFC 4685 (Atom message threading) * configurable constants (index limits, search results) * use tags as date-based skiplists for navigating history (maybe not needed with Xapian support nowadays?) * handle Xapian date range queries: http://mid.gmane.org/20151005222157.GE5880@survex.com * Consider storing git blob ID in Xapian doc data to avoid ref and tree lookups based on Message-Id. * streaming Email::MIME replacement: currently we generate many allocations/strings for headers we never look at and slurp entire message bodies into memory. (this is pie-in-the-sky territory...) * Allow in-place Xapian updates without clobbering the whole index (versioning each doc data entry?) for big archives * use REQUEST_URI properly for CGI / mod_perl2 compatibility with Message-IDs which include '%' (done?) * more test cases (use git fast-import to speed up creation) * large mbox/Maildir/MH/NNTP spool import (use git fast-import)