RELEASE NOTES for Perl version of Sisimai
================================================================================
- releases: "https://github.com/sisimai/p5-Sisimai/releases"
- download: "https://metacpan.org/pod/Sisimai"

v4.22.2
--------------------------------------------------------------------------------
- release: "Fri, 13 Oct 2017 11:33:00 +0900 (JST)
- version: "4.22.2"
- changes:
  - Code improvements in Sisimai::Reason::UserUnknown, and some parser modules 
    in Sisimai::Bite::Email.
  - Support parsing JSON object retrieved from SendGrid Event Webhooks #211.
  - Support "event": "spamreport" via Feedback Loop on SendGrid Event Webhooks.
  - Implement `Sisimai::Address->is_undisclosed` method.
  - Implement Sisimai::Rhost::GoDaddy to get a correct reason at parsing bounce
    mails from GoDaddy (reported at issue #236). Thanks to @ViktorNacht.
  - Remove obsoleted classes: Sisimai::MTA, Sisimai::MSP, and Sisimai::CED.
  - Remove obsoleted method: `Sisimai::Address->parse`.

v4.22.1
--------------------------------------------------------------------------------
- release: "Tue, 29 Aug 2017 17:25:22 +0900 (JST)"
- version: "4.22.1"
- changes:
  - Sisimai::Address was born again to resolve issue #227
    - Implement new email address parser method: find()
    - Implement new constructor: make()
    - Implement new writable accessors: name() and comment()
    - parse() method was marked as obsoleted
  - Build test with Perl 5.26 on Travis-CI.

v4.22.0
--------------------------------------------------------------------------------
- release: "Tue, 22 Aug 2017 18:25:55 +0900 (JST)"
- version: "4.22.0"
- changes:
  - Issue #215 and Pull-Request #225, bounce reason: "securityerror" has been
    divided into the following three reasons:
    - securityerror
    - virusdetected
    - policyviolation
  - Sisimai now works on Perl 5.26.0
  - Issue #226 All the MTA modules have been moved to Sisimai::Bite::* and old
    MTA modules: Sisimai::MTA, Sisimai::MSP, Sisimai::CED, and all the methods
    in these classes have been marked as obsoleted.
  - Issue #227 Experimental implementation: Sisimai::Address->find() as bourne
    again parser method for email addresses. Thanks to @SteveTheTechie.

v4.21.1
--------------------------------------------------------------------------------
- release: "Mon, 29 May 2017 14:22:22 +0900 (JST)"
- version: "4.21.1"
- changes:
  - Improved error message patterns to resolve issue #221, Thanks to @racke.
  - Add `mta-exim-30.eml` as a sample email in set-of-emails/ directory.
  - Changes file has been renamed to **ChangeLog.md** and converted to Markdown
    format.
  - Pull-Request #223, Improved code to detect error messages related to DNS at
    G Suite.
  - Improved code to detect RFC7505 (NullMX) error: sisimai/set-of-emails#4.
  - Code improvements for checking and decoding irregular MIME encoded strings
    at is_mimeencoded and mimedecode methods in Sisimai::MIME class reported at
    sisimai/rb-Sisimai#75 from @winebarrel.
  - Add unit test codes to test all the changes at sisimai/rb-Sisimai#75.

v4.21.0 - Support G Suite
--------------------------------------------------------------------------------
- release: "Mon, 10 Apr 2017 12:17:22 +0900 (JST)"
- version: "4.21.0"
- changes:
  - Experimental implementation: new MTA module Sisimai::MSP::US::GSuite for
    parsing a bounce mail returned from G Suite. Thanks to @racke at issue #218.
  - Improved `Sisimai::SMTP::Status->find()` method. The method checks whether
    a found value as D.S.N. is IPv4 address or not.
  - Improved code for getting error messages, D.S.N. values, and SMTP reply
    codes in `Sisimai::MTA::Postfix->scan()` method.
  - Issue #212, `Sisimai->make()` and `Sisimai::Message->new()` methods check
    the value of a `field` argument more strictly.
  - Fix some typos in method comments: Import pull-request #69 at Ruby version
    of Sisimai, https://github.com/sisimai/rb-Sisimai/pull/69. Thanks to @koic.
  - Issue #217: Fix some macros in Makefile to get cpanm. Thanks to @sgroef.

v4.20.2
--------------------------------------------------------------------------------
- release: "Sat, 11 Mar 2017 16:32:48 +0900 (JST)"
- version: "4.20.2"
- changes:
  - Pull-Request #207 Add some error message patterns for a bounce message from
    Amazon SES SMTP endpoint.
  - Register sample email "rfc3834-06.eml" based on an email that is uploaded
    from @rdeavila at https://github.com/sisimai/rb-Sisimai/issues/65 to test a
    vacation message.
  - Improvements of code for the callback feature: Add a new argument `field` in
    `Sisimai->make()` to pass email header names being captured and referred at
    `Sisimai::Message::Email` class.

v4.20.1
--------------------------------------------------------------------------------
- release: "Sat, 31 Dec 2016 22:02:22 +0900 (JST)"
- version: "4.20.1"
- changes:
  - Nothing changed. Follow the fixed version of rb-Sisimai(JRuby).

v4.20.0 - Support Bounce Ojbect (JSON)
--------------------------------------------------------------------------------
- release: "Sat, 31 Dec 2016 13:36:22 +0900 (JST)"
- version: "4.20.0"
- changes:
  - Issue #199 Experimental implementation: New MTA modules for 2 Cloud Email
    Deliveries. These modules can parse JSON formatted bounce objects and can
    convert to Sisimai::Data object.
    - Sisimai::CED::US::AmazonSES
    - Sisimai::CED::US::SendGrid
  - Format of `smtpagent` in the parsed result has been changed. It includes the
    category name of MTA/MSP modules like `MTA::Sendmail`, `MTA::Postfix`, and 
    `MSP::US::SendGrid`: issue #200.
  - The domain part of dummy email address defined in Sisimai::Address module
    has been changed from `dummy-domain.invalid` to **`libsisimai.org.invalid**;
    issue #202.
  - `Sisimai::SMTP->is_softbounce()` method has been deleted.

v4.19.0 - Callback Feature
--------------------------------------------------------------------------------
- release: "Tue, 18 Oct 2016 14:13:22 +0900 (JST)"
- version: "4.19.0"
- changes:
  - Remove utf8 flag from JSON string returned from at `Sisimai->dump()` method.
  - Implement a callback feature at `Sisimai->make()` and `Sisimai->dump()`
    methods. More imformation about the feature are available at the following
    pages:
    - http://libsisimai.org/en/usage#callback
    - http://libsisimai.org/ja/usage#callback
  - Implement `Sisimai->match()` method: issue #173.
  - Minor bug fix in `Sisimai::MSP::US::AmazonSES->scan()` method.

v4.18.1
--------------------------------------------------------------------------------
- release: "Sun, 11 Sep 2016 20:05:20 +0900 (JST)"
- version: "4.18.1"
- changes:
  - Fix bug in `Sisimai::MIME->qprintd()` method reported at issue #192.
  - Import sisimai/rb-Sisimai@fb45a47, MIME decoding improvements.
  - Issue #194, fix bug in `Sisimai::Mail->new()` called from `Sisimai->dump()`.
    It didn't work properly when email data read from STDIN.
  - `Sisimai->dump` and `Sisimai->make` methods die when the number of arguments
    is neither 1 nor 3.
  - Implement `Sisimai::String->to_plain()` for converting from HTML message to
    plain text before parsing, issue #8.
  - Remove `Sisimai::String->to_regexp()` method, use `qr/\Q...\E/` instead.

v4.18.0 - Improvements for Microsoft Exchange Servers
--------------------------------------------------------------------------------
- release: "Mon, 22 Aug 2016 20:40:55 +0900 (JST)"
- version: "4.18.0"
- changes:
  - Issue #189, Soft bounce improvement. Thanks to @Quickeneen.
  - Pull-Request #190, `Sisimai::SMTP->is_softbounce()` method has been marked
    as obsoleted. Use `Sisimai::SMTP::Error->soft_or_hard()` method instead.
  - Issue #185, Sisimai works on Perl 5.24.
  - Sisimai::MTA::Exchange has been renamed to Sisimai::MTA::Exchange2003.
  - Implement new MTA module Sisimai::MTA::Exchange2007.

v4.17.2
--------------------------------------------------------------------------------
- release: "Tue, 26 Jul 2016 21:00:17 +0900 (JST)"
- version: "4.17.2"
- changes:
  - Issue #174, Implement Sisimai::Rhost::ExchangeOnline module to pare a bounce
    mail from on-premises Exchange 2013 and Office 365.
  - The reason of status code: `4.4.5` is `systemfull`.
  - Issue #181, Fixed minor bug on OpenBSD.
  - Pull-Request #185: Code improvement at Sisimai::MSP::US::Office365.
  - Pull-Request #188: Code improvement at Sisimai::MIME, Thanks to @jonjensen.

v4.17.1
--------------------------------------------------------------------------------
- release: "Wed, 30 Mar 2016 14:00:22 +0900 (JST)"
- version: "4.17.1"
- changes:
  - Fixed issue #179 by pull-request #180, a variable in Sisimai/MTA/Exim.pm is
    not quoted before passing to `qr//` operator. Thanks to @dzolnierz.

v4.17.0 - New Error Reason "syntaxerror"
--------------------------------------------------------------------------------
- release: "Wed, 16 Mar 2016 12:22:44 +0900 (JST)"
- version: "4.17.0"
- changes:
  - Implement new reason **syntaxerror**. Sisimai will set **syntaxerror** to
    the raeson when the value of `replycode` begins with "50" such as 502, 503,
    or 504. issue #147.
  - Implement `description()` method at each file in `Sisimai/Reason` directory
    at issue #166.
  - Implement `Sisimai->reason()` method for getting the list of reasons Sisimai
    can detect and its description: issue #168.
  - Remove unused method `Sisimai::Reason->match()`, issue #169.
  - Remove unused methods in `Sisimai::MSP` and `Sisimai::MTA`, issue #136.
  - Remove unused module `Sisimai::ISO3166`, issue #137.
  - Remove unused module `Sisimai::RFC5321` and `Sisimai::RFC3463`, issue #131.
  - Some methods of Sisimai::Address class allow `postmaster`, `mailer-daemon`
    (without a domain part) as an email address.
  - `Sisimai::RFC5322->is_mailerdaemon()` method returns `1` when the argument
    includes `postmaster`.
  - Merge pull-request #172, new method `Sisimai::RFC5322->weedout()` and code
    improvements in all the MTA/MSP modules.

v4.16.0 - New Error Reason "delivered"
--------------------------------------------------------------------------------
- release: "Thu, 18 Feb 2016 13:49:01 +0900 (JST)"
- version: "4.16.0"
- changes:
  - Implement new reason **delivered**. Sisimai set `delivered` to the reason
    when the value of `Status:` field in a bounce message begins with `2`. This
    feature is optional and is not enabled by default. issue #155.
  - Implement new method `Sisimai->engine()`. The method returns the list of MTA
    and MSP module list implemented in Sisimai.

v4.15.0
--------------------------------------------------------------------------------
- release: "Sat, 13 Feb 2016 12:40:15 +0900 (JST)"
- version: "4.15.0"
- changes:
  - Implement new MSP module Sisimai::MSP::US::AmazonWorkMail at pull-request
    #162. The module parse bounce mails via Amazon WorkMail.
  - Implement new MSP module Sisimai::MSP::US::Office365 at pull-request #164.
    The module parse bounce mails via Microsoft Office 365.
  - Tiny code improvements: back port from the Ruby version of Sisimai.

v4.14.2
--------------------------------------------------------------------------------
- release: "Wed,  3 Feb 2016 12:26:19 +0900 (JST)"
- version: "4.14.2"
- changes:
  - Issue #154 Fix bug: remove CR(\r) at the end of string in some properties
    of Sisimai::Data before calling the constructor. Thanks to M Miyamoto.
  - Issue #151 fix bug that the value of foled `Message-Id` field could not be
    found at pull-request #157. Thanks to @0xcdcdcdcd.
  - Fix bug in code to get pseudo delivery status in Sisimai::MSP::RU::Yandex.
  - Implement `Sisimai::String->to_regexp()` method to fix bug in code to build
    regular expression reported at pull-request #160, Thanks to @negachov.
  - Improved message pattern of Sisimai::Reason::SpamDetected.
  - Issue #158, bug fix for substituting the value of `lhost` and `rhost`.

v4.14.1 - Sample Emails Moved To "set-of-emails" Repository
--------------------------------------------------------------------------------
- release: "Sat, 26 Dec 2015 20:00:00 +0900 (JST)"
- version: "4.14.1"
- changes:
  - eg/ directory has been renamed and sample email files have been moved to the
    project repository: https://github.com/sisimai/set-of-emails, issue #153.

v4.14.0
--------------------------------------------------------------------------------
- release: "Fri, 25 Dec 2015 11:04:14 +0900 (JST)"
- version: "4.14.0"
- changes:
  - **Repository URL has been changed to https://github.com/sisimai/p5-Sisimai**
  - `Sisimai::MTA->SMTPCOMMAND()` method has been obsoleted from this version.
    Use `Sisimai::SMTP->command()` instead, issue #136.
  - `Sisimai::MTA->LONGFIELDS` and `Sisimai::MTA->RFC822HEADERS` are obsoleted.
    Use `Sisimai::RFC5322->LONGFIELDS()` and `Sisimai::RFC5322->HEADERFIELDS()`
    instead.
  - Change internal method names of Sisimai::Message class, `rewrite()` begins
    `parse()`, `resolve()` begins `make()`.
  - Issue #110, #122 Code for reading email files in a directory is improved
    and got faster than before: merged Pull-Request #123.
  - Fixed bug reported at issue #124: warning message: `use of uninitialized
    value in substr at` is displayed when `Sisimai::Message->resolve()` method 
    parses an UNIX mbox which begins from blank line.
  - Merged Pull-Request #125, filehandle will not be closed until EOF of each
    UNIX mbox in `Sisimai::Mail::Mbox->read()` method.
  - Merged Pull-Request #126, replace `while( <$f> )` with `do {...}` block for
    reading each email file in a directory at `Sisimai::Mail::Maildir->read()`
    method.
  - Merged Pull-Request #132, Resolve issue #127: Sisimai cannot parse a mail
    which message body is MIME encoded. Thanks to @mrwushu.
  - Issue #134, Sisimai::RFC3463 and Sisimai::RFC5321 have been obsoleted but
    are not removed. Use Sisimai::SMTP::Status, Sisimai::SMTP::Reply instead. 
  - Merged Pull-Request #138, some code blocks in `Sisimai::Message->resolve()`
    have been divided into some methods.
  - Fixed bug at issue #142, Sisimai can not parse an email that TAB or Space
    character exists at the end of each line. Thanks to M Miyamoto.
  - Fixed bug at issue #144, support date format like `Thursday, Apr 29, ...`.
  - Improved code of Sisimai::MTA::IMailServer for support more error message
    patterns: issue #143.
  - Issue #145 Code improvements: back port from Ruby version of Sisimai.
  - Fix bugs in regular expression to detect SMTP command in Sisimai::MTA::X4
    and Sisimai::MTA::qmail modules.

v4.13.1 - Two White Cats
--------------------------------------------------------------------------------
- release: "Tue, 17 Nov 2015 14:13:10 +0900 (JST)"
- version: "4.13.1"
- changes:
  - Issue #95, Add some sample emails for Sisimai::MTA::Exim.
  - Improved code Sisimai::MTA::Exim to get the reason and the SMTP command from
    LMTP error message.
  - Improved error message patterns at the following modules: UserUnknown,
    Rejected, and Blocked.
  - Issue #96, Improved Sisimai::MTA::Exim for parsing "Frozen message".
  - Issue #101, Improved code for getting DSN value in Sisimai::MTA::Exim.
  - Issue #107, Improved slow regular expression in Sisimai::MSP::JP::EZweb.
  - Issue #114 (MTA Order Optimization) issue #116 (Performance tunings), and
    issue #118 (Regular expression across the MTA modules) are merged. These
    improvements that were taught from two white cats in my dream on Nov. 7,
    and have made Sisimai 1.15 times faster. Thanks to sensible white cats.

v4.13.0 - To Be Semantic Versioning
--------------------------------------------------------------------------------
- release: "Thu,  5 Nov 2015 16:11:12 +0900 (JST)"
- version: "4.13.0"
- changes:
  - **Issue #85, Use Semantic Versioning from this release. New version number
    is v4.13.0 <= v4.1.30.**
  - Issue #84, Experimental implementation: New module Sisimai::MTA::X5 and
    added a sample email(x5-01.eml) for the module. Thanks to Masayoshi.M .
  - Issue #86, Removed unused `version()` method from the following modules:
    Sisimai::RFC3464, Sisimai::RFC3834, Sisimai::ARF, Sisimai::MTA::*, and
    Sisimai::MSP::*::*.
  - Issue #88, #89: fixed Sisimai::MTA::Notes and added notes-04.eml.
  - Issue #90, #91: fixed code around `Sisimai::Data->alias()`.
  - Improved codes of Sisimai::MTA::*, Sisimai::MSP::*, Sisimai::RFC3464 and
    Sisimai::ARF as a precaution against serious bug reported on issue #89.
  - Improved codes and serious bug fix for issue #89 have made Sisimai 1.10
    times faster than before.
  - Issue #92, All the methods have YARD format comment.
  - Issue #93, #94: Fixed bug and improved code for getting alias address and
    setting the error reason in Sisimai::MTA::Exim.

v4.1.29
--------------------------------------------------------------------------------
- release: "Tue,  6 Oct 2015 10:55:00 +0900 (JST)"
- version: "4.1.29"
- changes:
  - Issue #83, New MTA module implemented as "Sisimai::MSP::US::ReceivingSES".
    This module parse bounce mails from Amazon SES(Receiving).
  - Improved code for getting and setting the value of `Status:` field.
  - Improved document in Sisimai::Data and Sisimai::Reason, imported from web
    site: http://libsisimai.org/ .
  - Added new sample email rfc3834-03.eml to test code for Sisimai::RFC3834.
  - Added new sample emails: sendmail-26,27,28,29,30,31,32.eml. 

v4.1.28 - HAPPY 1ST BIRTHDAY
--------------------------------------------------------------------------------
- release: "Sun, 16 Aug 2015 14:50:20 +0900 (JST)"
- version: "4.1.28"
- changes:
  - **Happy 1st Birthday To Sisimai !!**
  - Experimental implementation about issue #76: New module Sisimai::RF3834 is
    for detecting auto replied message and decides a reason as `vacation`.
  - Fixed bug in Sisimai::Message for setting the order of MTA, MSP modules.
  - Issue #70, Implemented code for using user defined MTA module and added
    Sisimai::MTA::UserDefined as a sample.
  - Issue #78, Implement new accessor `->softbounce()` in Sisimai::Data object.

v4.1.27 - Sisimai->dump() Method
--------------------------------------------------------------------------------
- release: "Fri, 17 Jul 2015 11:45:05 +0900 (JST)"
- version: "4.1.27"
- changes:
  - New method implemented: `Sisimai->dump('/path/to/mbox')` return parsed data
    as JSON string.
  - Updated error message patterns: Sisimai::Reason::NoRelaying, TooManyConn,
    and Blocked.
  - Fixed code in Sisimai::Reason::MesgTooBig. Error reason of bounce message
    that the value of `Status` field is 5.2.3 will be set as `exceedlimit`.
  - Fixed code to get the value of Message-Id header in the original message at
    Sisimai::Data class.
  - Sisimai reports the bounce reason as `onhold` when `Sisimail::Reason->get()`
    method did not decide the reason and the value of `diagnosticcode` is not
    empty.
  - Issue #74 is that reported at CPAN Testers Report might be fixed.
  - Issue #75, Improved code for parsing 2-digit year value in a `Date:` header
    at Sisimai::DateTime class.
  - Test codes for Sisimai::MTA, Sisimai::MSP, Sisimai::ARF, Sisimai::RFC3464
    have been integrated and improved.

v4.1.26 - New Error Reason "toomanyconn"`
--------------------------------------------------------------------------------
- release: "Sat,  4 Jul 2015 11:34:44 +0900 (JST)"
- version: "4.1.26"
- changes:
  - Module name changed from Sisimai::Reason::RelayingDenied to "NoRelaying".
  - Registered new error reason "TooManyConn". This reason is bounced due to 
    that too many connections or exceeded connection rate limit.
  - Included many error messages listed in SendGrid "Deliverability Center":
    "https://sendgrid.com/deliverabilitycenter/" as a regular expression at 
    Sisimai::Reason::*. Thanks to Bogdan B. and SendGrid.
  - Experimental implementation: `Sisimai::Reason->match()` is for detecting a
    bounce reason from given text as an error message.
  - Experimental impelmentation about issue #61: New MTA module implemented
    as "Sisimai::MTA::ApacheJames". The module is for parsing bounce emails 
    which are generated by Apache James/Java Apache Mail Enterprise Server.
    Thanks to John Aldrich Quan.
  - Issue #72, Support SMTP reply code in Sisimai::Data object.
  - Fixed code: Add "SystemFull" reason into `Sisimai::Reason->anotherone()`.
  - Improved regular expression in Sisimai::MSP::US::Google.

v4.1.25 - Reason Name "nospam" Changed To "spamdetected"
--------------------------------------------------------------------------------
- release: "Mon, 22 Jun 2015 11:45:29 +0900 (JST)"
- version: "4.1.25"
- changes:
  - **Reason name has been changed from "NoSpam" to "SpamDetected".**
  - Package name has been changed from Sisimai::Time to Sisimai::DateTime.
  - Implemnet Sisimai::Time again as a child class of Time::Piece.
  - The class of "timestamp" is now Sisimai::Time in Sisimai::Data object.
  - Implement Sisimai::Reason::HasMoved.
  - 2 emails bounced due to "expired" reason have been added as a sample for
    issue #50.
  - Fix bug in Sisimai::MTA::MailMarshalSMTP for a bounce mail which have no
    boundary strings.
  - Fix bug in Sisimai::MTA::Exim for setting an error reason decided by SMTP
    MAIL command.
  - Improved regular expression in Sisimai::RFC3464.
  - Update Sisimai::MDA, add an error message pattern defined in dovecot 1.2,
    dovecot/src/plugins/quota/quota.c.
  - Update message patterns at SpamDetected, SystemError, Blocked, Filtered,
    RelayingDenied, NetworkError, MesgTooBig, MailboxFull, SecurityError, 
    UserUnknown and Suspend.
  - Fix code for detecting MIME encoded string in Sisimai::MIME.
  - Implement `TO_JSON` method in Sisimai::Address for JSON module.
  - Add test code for sample emails in CRLF.
  - Add sample emails which is an IDN email.
  - Add sample emails which could not be parsed yet into eg/cannot-parse-yet/
    directory and implement test code.
  - Add sample emails which reason is "undefined" into eg/reason-is-undefined
    directory and implement test code.

v4.1.24
--------------------------------------------------------------------------------
- release: "Mon, 11 Jun 2015 22:20:59 +0900 (JST)"
- version: "4.1.24"
- changes:
  - Improved fallback code in Sisimai::RFC3464.
  - Add message patterns at NoSpam and HostUnknown in Sisimai/Reason.

v4.1.23
--------------------------------------------------------------------------------
- release: "Thu, 11 Jun 2015 13:20:59 +0900 (JST)"
- version: "4.1.23"
- changes:
  - Sisimai works on Perl 5.22.0.
  - New MTA module Sisimai::MTA::X4 for qmail clone MTAs.
  - Performance tuning, Sisimai is now 1.39 times faster than before.
  - Improved code in Sisimai/Message.pm: 1.62 times faster than before.
  - Bug fix in Sisimai::MSP::JP::EZweb and Sisimai::MSP::JP::KDDI.
  - Support "2015-04-29 01:23:45" date format in Sisimai::Time.
  - Support the value of Diagnostic-Code without the value of diagnostic-type
    field in Sisimai::RFC3464.
  - Emails in https://github.com/sendgrid/go-gmime/tree/master/gmime/fixtures
    and some emails have been added as a sample in eg/ directory.
  - Add message patterns at NoSpam, MailboxFull, RelayingDenied, UserUnknown, 
    Blocked, Filtered, SecurityError, Expired, HostUnknown, and NetworkError
    in Sisimai/Reason/ directory.
  - Fix bug in Sisimai::Data for calling `Sisimai::Time->parse()` method.
  - Sisimai::MTA::IMailServer and Sisimai::MTA::InterScanMSS updated.
  - Implement fallback code in Sisimai::RFC3464: parse entire message body to
    get a recipient address and error messages. The value of the `smtpagent`
    parsed by this code is "RFC3464::Fallback".

v4.1.22
--------------------------------------------------------------------------------
- release: "Thu, 28 May 2015 14:20:59 +0900 (JST)"
- version: "4.1.22"
- changes:
  - Merged pull request #59 (Support for Microsoft custom ARF format) at 
    https://github.com/azumakuniyuki/p5-Sisimai/pull/59 . Thanks to @jleroy.
  - Add Time::Piece and Module::Load to ./cpanfile. Thanks to @kkdYodoKazahaya
    at issue #60.
  - Update Sisimai::ARF for parsing Amazon SES Complaints bounces.

v4.1.21
--------------------------------------------------------------------------------
- release: "Tue, 21 Apr 2015 14:20:59 +0900 (JST)"
- version: "4.1.21"
- changes:
  - Update regular expressions of each error message pattern at Sisimai/Reason/
    direcotry: NoSpam, Suspend, Blocked, UserUnknown, Expired, NetworkError,
    MailboxFull and MesgTooBig.
  - Fix bug for setting the value of SMTP command at Sisimai::Data.
  - Update regular expression of "expired" in Sisimai::MTA::Exim.
  - Add three sample emails for `make test` in eg/ directory.

v4.1.20
--------------------------------------------------------------------------------
- release: "Thu,  9 Apr 2015 14:20:59 +0900 (JST)"
- version: "4.1.20"
- changes:
  - Update regular expressions of each error message pattern at SystemError.pm, 
    MesgTooBig.pm and NoSpam.pm in Sisimai/Reason.
  - Add two sample emails for `make test` in eg/ directory.

v4.1.19 - New Error Reason "nospam"
--------------------------------------------------------------------------------
- release: "Mon,  6 Apr 2015 14:20:59 +0900 (JST)"
- version: "4.1.19"
- changes:
  - Update regular expressions of each error message pattern at Rejected.pm,
    Mailboxfull.pm, MesgTooBig.pm, and UserUnknown.pm in Sisimai/Reason.
  - **New error reason "nospam" implemented.**
  - Some message patterns have moved from Sisimai::Reason::SecurityError to
    Sisimai::Reason::NoSpam module.

v4.1.18 - New Repository Name "p5-Sisimai"
--------------------------------------------------------------------------------
- release: "Fri, 27 Mar 2015 12:59:07 +0900 (JST)"
- version: "4.1.18"
- changes:
  - **Repository name on github has been changed to p5-Sisimai.**
  - Fixed code around regular expressions of "mailboxfull" and "expired" in MTA
    modules: Sisimai::MTA::qmail and Sisimai::MTA::Exim. Thanks to @m-walk at
    issue #57.
  - Update regular expressions of error message pattern at SecurityError.pm
    and Blocked.pm in Sisimai/Reason.

v4.1.17
--------------------------------------------------------------------------------
- release: "Mon,  2 Mar 2015 16:01:20 +0900 (JST)"
- version: "4.1.17"
- changes:
  - Improved regular expressions of networkerror, expired and related code in
    Sisimai::MTA::qmail. Thanks to @m-walk at issue #56.

v4.1.16
--------------------------------------------------------------------------------
- release: "Wed, 18 Feb 2015 16:01:20 +0900 (JST)"
- version: "4.1.16"
- changes:
  - Add bounce emails as a sample from Postfix 3.0.0.
  - Improved code for reading mail data from STDIN at Sisimai::Mail.
  - Try to load YAML::Syck module instead of YAML module when string `"yaml"`
    is specified in the argument of `Sisimai::Data->dump()` method.

v4.1.15
--------------------------------------------------------------------------------
- release: "Wed, 11 Feb 2015 13:59:59 +0900 (JST)"`
- version: "4.1.15"
- changes:
  - Improved code for detecting abuse message "opt-out" in Sisimai::ARF.
  - Minor improvements in Sisimai::MTA::Postfix.

v4.1.14 - Accessors Of Sisimai::Mail Changed
--------------------------------------------------------------------------------
- release: "Fri,  6 Feb 2015 13:29:59 +0900 (JST)"
- version: "4.1.14"
- changes:
  - Update Sisimai::MSP::US::Outlook for delayed message.
  - Implement new module: Sisimai::Mail::STDIN for reading email data from
    standard-in.
  - **Changed accessor names in Sisimai::Mail::Mbox and Sisimai::Mail::Maildir
    modules: `name` to `file`, `files` to `inodes`.**
  - **Accessor `path` always return the path to a mailbox or path to each mail
    file in Maildir/ at Sisimai::Mail::Mbox and Sisimai::Mail::Maildir.**
  - Implement new accessor `dir`, it returns the path to directory of given
    argument in Sisimai::Mail::Mbox and Sisimai::Mail::Maildir.

v4.1.13 - Sisimai::Reason->index
--------------------------------------------------------------------------------
- release: "Tue, 27 Jan 2015 15:00:55 +0900 (JST)"
- version: "4.1.13"
- changes:
  - Fixed bug in test code for Sisimai::DATA::YAML. Thanks to CPAN Testers
    Reports.
  - Implement new method `Sisimai::Reason->index()`, returns the list of bounce
    reasons.

v4.1.12 - New Error Reason "networkerror"
--------------------------------------------------------------------------------
- release: "Sat, 24 Jan 2015 15:00:59 +0900 (JST)"
- version: "4.1.12"
- changes:
  - Update sample code in POD at Sisimai::RFC5322 and test codes (RT#101436,
    Issue #41, See https://rt.cpan.org/Ticket/Display.html?id=101436). Thanks
    to Mark Stosberg.
  - **Changed accessor name: `data` to `path` in Sisimai::Mail.**
  - Space character will be inserted after ":" in Sisimai::Data::JSON.
  - Improved regular expression for getting the value of email header at each
    MTA module.
  - Message patterns related to DNS or network error have been moved to new
    module: Sisimai::Reason::NetworkError.
  - **New error reason "networkerror": the value of reason for bounce messages
    returned due to network related errors will be set as the reason.**
  - **Sisimai does not rely on Try::Tiny module from this version.**

v4.1.11 - Performance Improvements
--------------------------------------------------------------------------------
- release: "Thu, 15 Jan 2015 15:01:59 +0900 (JST)"
- version: "4.1.11"
- changes:
  - Improved code in Sisimai/Mail/Mbox.pm: using `substr()` function instead of
    a regular expression is 1.46 times faster than before.
  - Code improvement in Sisimai/Reason.pm: using `grep {}` block instead of a 
    regular expression is 133% faster than before.
  - Revert commit 0c7782cecafdc923d3c82b81a201a787611654ea for Sisimai::Time.
  - Improvement of pattern match in Sisimai/Message.pm is 2.27 times faster.
  - Improvement of regular expressions in each MTA module is 115% faster than
    before.

v4.1.10 - +2 MTA Modules
--------------------------------------------------------------------------------
- release: "Mon, 12 Jan 2015 17:59:35 +0900 (JST)"
- version: "4.1.10"
- changes:
  - Implement the following MTA/MSP modules:
    - Sisimai::MSP::UK::MessageLabs (Symantec.cloud: formerly MessageLabs)
    - Sisimai::MSP::US::Bigfoot (bigfoot.com)
  - Added 2 sample emails: arf05.eml, arf-06.eml and improved Sisimai::ARF
    from pull request #37, Thanks to @jcbf.
  - Merged pull request #38, Updated Sisimai::US::Facebook and DMARC forensic
    related codes, and error message patterns in Sisimai::Reason::* modules.
    Thanks to @jcbf.
  - Merged pull request #39, Updated Sisimai::RFC3464 and message patterns in
    Sisimai::Reason::SecurityError and Suspended. Thanks to @jcbf.
  - Regular expression improvements in each MTA module(issue #40) is between
    122% and 800% faster than Sisimai 4.1.9.

v4.1.9  - +3 MTA Modules
--------------------------------------------------------------------------------
- release: "Wed, 31 Dec 2014 18:59:22 +0900 (JST)"
- version: "4.1.9"
- changes:
  - Implement the following MTA/MSP modules:
    - Sisimai::MTA::X3 (Unknown MTA(3))
    - Sisimai::MSP::DE::EinsUndEins (1&1)
    - Sisimai::MTA::MailMarshalSMTP (Trustwave Secure Email Gateway: formerly MailMarshal SMTP)
  - Improved code for getting error message in a bounce mail from MXLogic.
  - Added 4 sample emails from pull request #32, Thanks to @jcbf.
  - Added 4 sample emails and updated error message patterns at some files in
    Sisimai/Reason directory from pull request #34, Thanks to @jcbf.
  - Improved code for getting FBL related values in Sisimai::ARF.

v4.1.8  - YAML is Also Supported
--------------------------------------------------------------------------------
- release: "Fri, 19 Dec 2014 17:22:59 +0900 (JST)"
- version: "4.1.8"
- changes:
  - Support new data format: YAML(optional, "YAML" module required).

v4.1.7
--------------------------------------------------------------------------------
- release: "Thu, 18 Dec 2014 23:59:59 +0900 (JST)"
- version: "4.1.7"
- changes:
  - Tiny code improvement of Sismai::MSP::RU::Yandex.
  - Improved code for detecting email bounce from MXLogic.
  - Add some message patterns into Sisimai::Reason::Expired.
  - Implement the following MTA/MSP modules:
    - Sisimai::MSP::US::Zoho (Zoho Mail)
    - Sisimai::MTA::X2 (Unknown MTA(2))
  - Improved code for getting error message in a bounce mail from Zoho Mail.

v4.1.6
--------------------------------------------------------------------------------
- release: "Sun,  7 Dec 2014 22:44:36 +0900 (JST)"
- version: "4.1.6"
- changes:
  - Improved code for parsing email bounce from @nokiamail.com.
  - Implement Sisimai::MSP::RU::Yandex for email bounces from Yandex.Mail.

v4.1.5
--------------------------------------------------------------------------------
- release: "Fri,  5 Dec 2014 18:20:22 +0900 (JST)"
- version: "4.1.5"
- changes:
  - Fix newline of some sample emalis in `eg/` directory.

v4.1.4
--------------------------------------------------------------------------------
- release: "Thu,  4 Dec 2014 20:40:22 +0900 (JST)"
- version: "4.1.4"
- changes:
  - Improved code for checking bounce mail in Sisimai::MTA::OpenSMTPD.
  - Implement the following modules for Email Service Providers:
  - Sisimai::MSP::RU::MailRu (@mail.ru)
  - Sisimai::MSP::DE::GMX (GMX)

v4.1.3  - Add 5 MTA/MSP Modules
--------------------------------------------------------------------------------
- release: "Sun, 23 Nov 2014 21:22:55 +0900 (JST)"
- version: "4.1.3"
- changes:
  - Improved code for detecting error reason in Sisimai::Reason module.
  - Implement the following MTA/MSP modules:
  - Sisimai::MTA::MessagingServer (Oracle Communications Messaging Server, Sun Java System Messaging Server)
  - Sisimai::MTA::X1 (Unknown MTA(1))
  - Sisimai::MSP::US::Yahoo (Yahoo! MAIL)
  - Sisimai::MSP::US::Aol (Aol Mail)
  - Sisimai::MSP::US::Outlook (Outlook.com)

v4.1.2  - Key Name Changed To "timestamp"
--------------------------------------------------------------------------------
- release: "Sat, 22 Nov 2014 22:22:22 +0900 (JST)"
- version: "4.1.2"
- changes:
  - Require `Time::Local` 1.19 or later for fixing issue #21, #23, and #24.
  - **Key name of time stamp has been changed from `date` to timestamp`**.
  - Data sources and hash algorithm of token string in parsed data have been 
    changed.
  - Implement the following MTA modules:
    - Sisimai::MTA::InterScanMSS (Trend Micro InterScan Messaging Security Suite)
    - Sisimai::MTA::SurfControl (WebSense SurfControl)
    - Sisimai::MTA::V5sendmail (Sendmail v5 and other MTAs based on V5 Sendmail)
  - Fixed bounce reason names in Sisimai::RFC3463.

v4.1.1  - Support 6+ Commercial MTAs
--------------------------------------------------------------------------------
- release: "Mon, 10 Nov 2014 15:59:03 +0900 (JST)"
- version: "4.1.1"
- changes:
  - Fix tiny bug in `Sisimai::MTA::Exim`.
  - Add many sample emails into `eg/` directory.
  - Improved code for detecting connection errors at Sendmail and Courier.
  - Sisimai::RFC3464 and Sisimai::MTA::Exchange imporved.
  - Implement the following MTA/MSP modules for commercial MTAs:
    - Sisimai::MTA::Notes (Lotus Notes)
    - Sisimai::MTA::McAfee
    - Sisimai::MTA::MXLogic (McAfee Product)
    - Sisimai::MTA::MailFoundry
    - Sisimai::MTA::IMailServer (IPSWITCHI IMail Server)
    - Sisimai::MTA::mFILTER (DigitalArts m-FILTER)
    - Sisimai::MTA::Activehunter (TransWARE Active!hunter)
  - Improved code for deciding error reason at Sendmail and qmail.

v4.1.0  - Sisimai::Group Removed Permanently
--------------------------------------------------------------------------------
- release: "Sat,  4 Oct 2014 15:09:09 +0900 (JST)"
- version: "4.1.0"
- changes:
  - Sisimai::Group::* child classes and `provider`, `category` as a property in
    the parsed data have been removed permanently.
  - Fix the newline in sample email files for `make test`.

v4.0.2  - Support Amazon SES and SendGrid
--------------------------------------------------------------------------------
- release: "Wed, 10 Sep 2014 22:45:43 +0900 (JST)"
- version: "4.0.2"
- changes:
  - Implement the following MTA/MSP modules:
    - Sisimai::MSP::US::AmazonSES
    - Sisimai::MSP::US::SendGrid
    - Sisimai::MTA::Domino (IBM Domino)
  - Large scale code refactoring at Sisimai::RFC3464.

v4.0.1
--------------------------------------------------------------------------------
- release: "Sun, 17 Aug 2014 23:00:00 +0900 (JST)"
- version: "4.0.1"
- changes:
  - Fixed bug for reading each email file in the Maildir given as an argument
    of `Sisimai::Mail::Maildir->read()` method.
  - Refactoring around codes to return the parsed data.
  - Implement `make()` method to get bounce data at Sisimai.pm.

v4.0.0 - The First Release
--------------------------------------------------------------------------------
- release: "Sat, 16 Aug 2014 20:00:00 +0900 (JST)"
- version: "4.0.0"
- changes:
  - The first release of Sisimai.

