+* configurable constants (quote folding, index limits)
+* use tags as date-based skiplists for navigating history
+* per-message views should be able to quickly navigate to replies.
+ (n.b.: this is SMTP, we must account for out-of-order delivery)
+* search, Xapian bindings are pretty common on GNU/Linux distros
+* NNTP server (is there demand for one?)
+* improve + document mlmmj integration, currently only at:
+ http://bogomips.org/unicorn-public/m/20140508084301.GA2033%40dcvr.yhbt.net