NAME¶

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

SYNOPSIS¶

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

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!
  ],

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.