NAME

       Sisimai::Reason::HostUnknown - Bounce reason is "hostunknown" or not.

SYNOPSIS

           use Sisimai::Reason::HostUnknown;
           print Sisimai::Reason::HostUnknown->match('550 5.2.1 Host Unknown');   # 1

DESCRIPTION

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

       This is the error that a domain part (Right hand side of @ sign) of a recipient's email address does not
       exist. In many case, the domain part is misspelled, or the domain name has been expired. Sisimai will set
       "hostunknown" to the reason of email bounce if the value of Status: field in a bounce mail is 5.1.2.

           Your message to the following recipients cannot be delivered:

           <kijitora@example.cat>:
           <<< No such domain.

CLASS METHODS

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

           print Sisimai::Reason::HostUnknown->text;  # hostunknown

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

           print Sisimai::Reason::HostUnknown->match('550 5.2.1 Host Unknown');   # 1

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

AUTHOR

       azumakuniyuki

COPYRIGHT

       Copyright (C) 2014-2018,2020,2021,2023 azumakuniyuki, All rights reserved.

LICENSE

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