phpman > perldoc > Email::MessageID(3pm)

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

VERSION
    version 1.406

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.

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

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

    This class method constructs an Email::Address 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 AT geeknest.com>

    *   Ricardo SIGNES <rjbs AT cpan.org>

CONTRIBUTOR
    Aaron Crane <arc AT cpan.org>

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.