NAME

       Email::MessageID - Generate world unique message-ids.

VERSION

       version 1.408

SYNOPSIS

         use Email::MessageID;

         my $mid = Email::MessageID->new->in_brackets;

         print "Message-ID: $mid\x0D\x0A";

DESCRIPTION

       Message-ids are optional, but highly recommended, headers that identify a message
       uniquely. This software generates a unique message-id.

PERL VERSION

       This library should run on perls released even a long time ago.  It should work on any
       version of perl released in the last five years.

       Although it may work on older versions of perl, no guarantee is made that the minimum
       required version will not be increased.  The version may be increased for any reason, and
       there is no promise that patches will be accepted to lower the minimum required perl.

METHODS

   new
         my $mid = Email::MessageID->new;

         my $new_mid = Email::MessageID->new( host => $myhost );

       This class method constructs an Email::MessageID object containing a unique message-id.
       You may specify custom "host" and "user" parameters.

       By default, the "host" is generated from "Sys::Hostname::hostname".

       By default, the "user" is generated using "Time::HiRes"'s "gettimeofday" and the process
       ID.

       Using these values we have the ability to ensure world uniqueness down to a specific
       process running on a specific host, and the exact time down to six digits of microsecond
       precision.

   create_host
         my $domain_part = Email::MessageID->create_host;

       This method returns the domain part of the message-id.

   create_user
         my $local_part = Email::MessageID->create_user;

       This method returns a unique local part for the message-id.  It includes some random data
       and some predictable data.

   in_brackets
       When using Email::MessageID directly to populate the "Message-ID" field, be sure to use
       "in_brackets" to get the string inside angle brackets:

         header => [
           ...
           'Message-Id' => Email::MessageID->new->in_brackets,
         ],

       Don't make this common mistake:

         header => [
           ...
           'Message-Id' => Email::MessageID->new->as_string, # WRONG!
         ],

AUTHORS

       •   Casey West <casey@geeknest.com>

       •   Ricardo SIGNES <cpan@semiotic.systems>

CONTRIBUTORS

       •   Aaron Crane <arc@cpan.org>

       •   Pali <pali@cpan.org>

       •   Ricardo Signes <rjbs@semiotic.systems>

COPYRIGHT AND LICENSE

       This software is copyright (c) 2004 by Casey West.

       This is free software; you can redistribute it and/or modify it under the same terms as
       the Perl 5 programming language system itself.