Email::MessageID(3)

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

SYNOPSIS
  use Email::MessageID;

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

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

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
The Message-Id header must start and end with angle brackets. This is a common mistake:

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

Instead, use "in_brackets" to get the string inside angle brackets.

SEE ALSO
Email::Address, Time::HiRes, Sys::Hostname, perl.

PERL EMAIL PROJECT
This module is maintained by the Perl Email Project.

<http://emailproject.perl.org/wiki/Email::MessageID>

AUTHOR
Casey West, <casey@geeknest.com>.

COPYRIGHT
  Copyright (c) 2004 Casey West.  All rights reserved.
  This module is free software; you can redistribute it and/or modify it
  under the same terms as Perl itself.