+soon - MUST:
+- blacklist DigiNotar/Comodo hacks/certs, possibly with Chrome's serial#
+ list?
+- check if wildcards from X.509 are handled as strictly as required by
+ the RFCs.
+- audit if there are further untrusted data report_*() calls.
+- Debian Bug #475239, MIME decoder may break up words (need to quote results)
+- put bare IP addresses in brackets for SMTP (check if there are RFC
+ 1123/5321/5322 differences)
+- Fix further occurrences of SMTP reply code handling:
+ - for proper smtp_reponse caching of multiline codes (there are some)
+ - for stomping over control characters.
+- check if smtpname and smtpaddress in particular work as advertised,
+ thread "Fetchmail with Postfix virtual users" around 2009-09-23 on
+ fetchmail-users@, by Joost Roeleveld and Gerard Seibert.
+- virtual domain DOCUMENTATION (rewriting @example.com to
+ @virtual.example.com possible? Joost Roeleveld, thread "Fetchmail with
+ Postfix virtual users" around 2009-09-23 on fetchmail-users@).
+
+soon - SHOULD:
+- support NIL and strings where they are alternatives to literals
+- Debian Bug #531589: fetchmail ignores SIGUSR1 in idle mode.
+ seems non-trivial to fix: in imap_idle(), we wait for untagged
+ responses, and may be deep in SSL_peek -- and that restarts the
+ underlying blocking read() from the socket, so we never break out of
+ the SSL_peek() with SIGUSR1.
+- add repoll for all kinds of auth failures
+ (requires framework to track which auth failed in auto mode)
+- SockOpen sometimes exits with errno == 0, confusing users (found with
+ Google RealTime on Twitter)
+- make sure the man page completely lists all options (f. i. sslcertpath) in
+ the tables.
+- allow \Deleted without \Seen, rf.
+ http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=466299
+- document IMAP4 ACL requirements
+- CRYPTO: log configured server name on certificate mismatch (perhaps pay
+ attention to via entries and stuff like that)
+- CRYPTO: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=432618
+ * write a table of combinations of TLS/SSL options
+- add To: header to warning mails (authfail for instance)
+- Fix TOCTOU race around prc_filecheck*
+- Read CAPABILITY from greeting if present, saves one round trip.
+- Check if LAST argument is properly validated against message count.
+- add Message-ID: header and other SHOULD headers to warning mails?
+- report actual SMTP error with "SMTP listener refused delivery", sugg.
+ Richard Brooksby, fetchmail-users 2010-04-06.
+
+soon - MAY:
+- find a better replacement for sscanf parsing - we don't usually
+ detect errors in format strings such as "* %d FETCH " because we don't
+ check if the FETCH is (a) present, (b) consumed.
+- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=471176
+ => fetchmail: support utf-8 encoding in log file
+ Revisit http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=400719
+ => syslog messages are localised
+ http://lists.debian.org/debian-devel/2006/11/msg01068.html
+- when logging to syslog, disable locale?
+- Get rid of peeking in socket.c? MSG_PEEK seems non-portable.
+- revise ticker, and add something like .........20%.... ... 100%
+ (suggested by Yue Wu)
+
+questionable:
+- Convert POP3 UIDs to X-UIDL?
+- fetch IMAP message in one go (fetchmail-devel by Adam Simpkins
+ <simpkins@cisco.com> around Nov 2nd)?
+
+7.0:
+- Properly free host/user entries (through C++ class instantiation and destructors...)
+- Remove stupid options, such as spambounce, or deferred bounces for anything
+ but wrong addresses
+- Do not ever guess envelope from content headers such as To:/Cc:/Resent-To: or
+ similar.
+- Replace sscanf/fscanf by functions that do range checking
+ (strtol/strtoul), and make arguments unsigned long.
+- drop LAST support
+- use PS_PROTOCOL for pre-/post-connect command failures - 6.3 uses
+ PS_SYNTAX, and that's not necessarily the case. At least if the
+ command terminates with a signal, we should report PS_PROTOCOL.
+- revisit maximum allowed rcfile permissions, fix inconsistency
+ (silently allowing g+x).
+- make UID code more efficient, parsing is O(n^2), should be no worse
+ than O(n log n), lookup is O(n), should be O(log n).
+ * Idea for C: use <search.h> tfind/tsearch. Need to split idlist up
+ so it only keeps the ids, and use an array to track status.
+- help systematic debugging
+ - by making logging more strict (Postfix's msg_* as example??)
+ - by adding a --loggingtest or something that emits
+ a set of test log messages at various severity levels, in order to
+ make sure people get complete logs.
+ - by adding messages where fetchmail stuffed its output.
+- Debian Bug #454291 fetchmail --quit: should check, that pid file
+ really contains pid of fetchmail process (Dmitry Nezhevenko)
+ => use fcntl() lock?
+- feature to skip first N or all messages upon first download, or fetch
+ last N.
+- download only messages whose headers match a filter (by Toby, Usenet
+ Nov 2007 de.comm.software.mailserver
+ Message-ID: <1195033726.123704.296060@k79g2000hse.googlegroups.com>)
+- feature request by Daniel Goering <g_daniel@gmx.net> on
+ fetchmail-devel 2007-11-15: populate .fetchids from current messages.
+ (it'll probably be useful to limit this to "all but the 10 latest" or
+ "all before date this-and-that")
+- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=374514
+ "Deleting fetchids file" vs. POP3 - probably unneeded if we use IMAP UIDs.
+- CRYPTO: change SSL/TLS UI incompatibly, making it easier to use
+- CRYPTO: allow selection of SSL/TLS Ciphers
+- CRYPTO: perhaps switch to libgsasl and libgnutls (which doesn't talk SSLv2,
+ but we should abandon that anyways).
+- CRYPTO: perhaps port to NSS? Check license and features and required procedure
+ changes. - Redhat Bugs #333741 (crypto consolidation), #346891 (port fetchmail to NSS)
+- CRYPTO: make the SSL default v3 (rather than v23).
+- CRYPTO: remove sslfingerprint? too easily abused (see NEWS)
+- CRYPTO: force sslcertck
+- CRYPTO: by default forbid cleartext or other compromising password
+ schemes over insecure connections?