+* Perl and several modules: (Debian package name)
+ - Date::Parse libtimedate-perl
+ - Email::MIME libemail-mime-perl
+ - Email::MIME::ContentType libemail-mime-contenttype-perl
+ - Encode::MIME::Header perl
+
+Optional components:
+
+* MTA - postfix is recommended (for public-inbox-mda)
+* SpamAssassin (spamc/spamd) (for public-inbox-watch/public-inbox-mda)
+
+Optional Perl modules:
+
+ - Plack[1] libplack-perl
+ - URI::Escape[1] liburi-perl
+ - Search::Xapian[2][3] libsearch-xapian-perl
+ - IO::Compress::Gzip[3] perl-modules (or libio-compress-perl)
+ - DBI[3] libdbi-perl
+ - DBD::SQLite[2][3] libdbd-sqlite3-perl
+ - Danga::Socket[4] libdanga-socket-perl
+ - Net::Server[5] libnet-server-perl
+ - Filesys::Notify::Simple[6] libfilesys-notify-simple-perl
+
+[1] - Optional, needed for serving/generating Atom and HTML pages
+[2] - Optional, only required for NNTP server
+[3] - Optional, needed for gzipped mbox support over HTTP
+[4] - Optional, needed for bundled HTTP and NNTP servers
+[5] - Optional, needed for standalone daemonization of HTTP+NNTP servers
+[6] - Optional, needed for public-inbox-watch Maildir watcher
+
+When installing Search::Xapian, make sure the underlying Xapian
+installation is not affected by an index corruption bug:
+
+ https://bugs.debian.org/808610
+
+For Debian 8.x (jessie), this means using Debian 8.5 or later.
+
+public-inbox will never store unregeneratable data in Xapian
+or any other search database we might use; Xapian corruption
+will not destroy critical data.