NAME

       Sisimai::Reason::UserUnknown - Bounce reason is "userunknown" or not.

SYNOPSIS

           use Sisimai::Reason::UserUnknown;
           print Sisimai::Reason::UserUnknown->match('550 5.1.1 Unknown User');   # 1

DESCRIPTION

       Sisimai::Reason::UserUnknown checks the bounce reason is "userunknown" or not.  This class is called only
       Sisimai::Reason class.

       This is the error that a local part (Left hand side of @ sign) of a recipient's email address does not
       exist. In many case, a user has changed internet service provider, or has quit company, or the local part
       is misspelled. Sisimai will set "userunknown" to the reason of email bounce if the value of Status: field
       in a bounce email is 5.1.1, or connection was refused at SMTP RCPT command, or the contents of
       Diagnostic-Code: field represents that it is unknown user.

           <kijitora@example.co.jp>: host mx01.example.co.jp[192.0.2.8] said:
             550 5.1.1 Address rejected kijitora@example.co.jp (in reply to
             RCPT TO command)

CLASS METHODS

   "text()"
       "text()" returns string: "userunknown".

           print Sisimai::Reason::UserUnknown->text;  # userunknown

   "match(string)"
       "match()" returns 1 if the argument matched with patterns defined in this class.

           print Sisimai::Reason::UserUnknown->match('550 5.1.1 Unknown User');   # 1

   "true(Sisimai::Data)"
       "true()" returns 1 if the bounce reason is "userunknown". The argument must be Sisimai::Data object and
       this method is called only from Sisimai::Reason class.

AUTHOR

       azumakuniyuki

COPYRIGHT

       Copyright (C) 2014-2021 azumakuniyuki, All rights reserved.

LICENSE

       This software is distributed under The BSD 2-Clause License.

perl v5.32.1                                       2021-11-25                  Sisimai::Reason::UserUnknown(3pm)