v2.0.0.6
   - PolluStop router module now accepts router entries with a % instead of a @
   - Added CheckMoreThanReturnPath feature. When you're not using SMTP AUTH, people can send you mail in your behalf, and this may trick Pollustop in
      not scanning the mail. If you enable this setting, PolluStop verifies other things to determine the sender. Leave it disabled if you use SMTP AUTH.

v2.0.0.5
   - Changed the parser flags to generate a 8-bits parser

v2.0.0.4
   - Fixed a small display problem in the Warning messages.
   - Added PGP check and tweak (EXPERIMENTAL)
   - PolluStop now waits for the first INTF command to initialize itself to be sure CGPro is done reading its settings files (to avoid sharing violation)

v2.0.0.3
   - Added Encrypted Zip detection in the FindAttachments module
   - Modified the Router to make it stop matching domain when the domain is final

v2.0.0.2
   - Fixed the Router Parser, was not able to read the router entries when the first entry was a new line or a comment

v2.0.0.1
   - Fixed the Ignore flag on learning modes
   - Fixed the MessageCount on Unlearn mode (was increased instead of being decreased)
   - People that used Unlearn mode or used -i flag while doing training can redo the training from scratch for more accuracy.

v2.0
   - Recreated the default Spam database from scratch. Enhanced the cleanup process.
   - Separated package in two: binaries and database. *nix packages are now made with tar and gzip and should contain correct exec permissions
   - Fixed a small display bug in debug mode
   - Fixed: An empty [Ignore] instruction in the settings file could remove the main domain from the scanned list
   - Fixed: An empty [Scan] instruction in the settings file could add the main domain to the scanned list
   - Fixed: A bug in lockfiles prevented second instance of the same installation on non-Win32 platforms
   - Added a math feature to protect against the now common "accented words" attack (New setting, DoubleCheckWithoutAccents)
   - Added a math feature to reduce the bias caused by the To/CC fields and the shared database (New setting, OnlyAllowHighTOCCTokens).
   - Removed ConfidenceLevel setting, replaced by NewWordConfidenceOnRare, another concept
   - HTML entities like "&eacute;" are now converted to the equivalent character before token evaluation
   - Successful testing with Communigate Pro 4.2b6
   - Fixed a problem in router parser with PIPE entries
   - A few changes in default settings, a complete review of your existing configuration is strongly recommended

v2.0 Release Candidate 3
   - Integrated the enhanced threading and platform-independant library developed for another filter.
   - Fixed a bug in licensing.
   - Added a multi-process protection in licensing.
   - Added three new settings (ScanGroups, ScanForwarders, ScanLists) for people who doesn't want to include these in their license size
   - Fixed a timing bug to increase the delay between server info calculations
   - Fixed some typos in log messages

v2.0 Release Candidate 2
   - The OS-independent library has been updated, introducing its optimizations into PolluStop (file access and information query)
   - Fixed a small glitch that causes PolluStop to reload the router information for each message received (bug introduced in rev 2)

v2.0 Release Candidate 1 rev 2 (Win32 only)
   - Modified the thread library wrapper, the locking objects were not reliable. Since there's no wrapper in the *nix versions, this bug doesn't affect them.

v2.0 Release Candidate 1 rev 1
   - Added a syntax condition to the router parser for a case not specified in CGPro documentation

v2.0 Release Candidate 1
   - Filter/Scan: lines are not interpreted anymore when ScanAllLocalDomains is set
   - Remplaced Genera/ScanInternal by ScanFromLocalScanned & ScanFromLocalNonScanned
   - Modified a few strings
   - The builtin Attachment Finder has been updated with the new features of Find_Attachments v1.06
   - Fixed detection of GB2312 & Windows-1251/2 character sets
   - Fixed domain alias parsing
   - Now using Communigate Pro router entries (with settings file and domain aliases) to determine the path of a message
   - New log level (debug) added (undocumented)
   - New mode (router test) added (undocumented)
   - Fixed SubjectPrefix (discrepancy between doc and setting, and the value was hardcoded)
   - Fixed Endianness of database bytes on Solaris (Sparc) - the database is now transferable from i386 to sparc
   - Added a new supported platform: Solaris (i386)

v2.0 public beta 7 rev 1
   - Fixed Modify Subject feature to avoid incorrect relaying.
   - Unlicensed/Standalone mode doesn't try anymore to match Domains and Account settings with existing domains and accounts
   - Added a warning when database is not trained enough (< 1000 messages in Good or Spam database)

v2.0 public beta 7
   - Fixed Diagnostic mode (dump all was crashing)
   - Messages to external users with names similar to [LEARN-Prefix] were treated by pollustop as control messages.
   - Added a lockfile to avoid multiple instance of the same database loaded
   - Added "Local" Drop directory. You can now put things in [pollustop path]/Drop/Spam and [pollustop path]/Drop/Good, the current running instance will take care of them.
   - From now, if you try to une the Learn feature and there's already a pollustop instance running with the same database, the learn request is transferred to the running instance that will take care of it in the DropMailboxes thread.
   - Added the possibility to modify the Subject line when the message score is high enough

v2.0 public beta 6 rev 1
   - Fixed Forward To Learn feature

v2.0 public beta 6
   - Added "ALL" to Filter settings
   - Removed "SCANRELAY" and "SCANOUTBOUND" from general settings,
     can't really be used or useful and were causing problems and support questions.
   - Better handling of non-ASCII characters in tokens
   - Added MATH.GOODIMPORTANCE setting to give additional importance to Good corpus.
   - Context Tagged tokens, helps the filter to determine the part of the message where the token comes from
   - Now filters with To and CC fields too, along with Subject.
   - Completely rewrote the Settings file
   - Tokens are now case sensitive,
   - Internal "timeout", the filter stops scanning after a preset number of line to avoid CGP timeout
   - Tokens polymorphism
   - "Interesting" tokens threshold
   - A lot of new settings
   - DropMailboxes separate process no longer exists, now multithreaded.

v2.0 public beta 5 revision 1
   - Fixed a crash occuring with euc-kr character set

v2.0 public beta 5
   - Fixed bug with POP retrieval on linux/osx/freebsd. CRLF issue.
   - Fixed bug that prevented PolluStop training from .mbox files
   - Small other optimisations
   - USETOCCMATCH is now disabled by default

v2.0 public beta 4
   - Fix bug about opened filehandles. Some were not closed and after a while (depending on
     the number of domains in the server) the process was running out of filehandles.
   - Fixed another bug regarding licensing check. Was done too often.

v2.0 public beta 3
   - Fixed database compatibility between Intel and Motorola platforms (endianness)
   - Fixed problems while reading POP message if the message contained NULL chars
   - Small bugfix in licensing module. New licenses are required.

v2.0 public beta 2
   - "Floating Point Exception" bug on training fixed.
   - Settings parser problem with tab characters fixed
   - Integrated changes made to Find_Attachments (v1.04->v1.05)

v2.0 public beta 1
   - First public release of PolluStop

[...]

v1.0
   - First release of PolluStop, perl version