Email::MessageID(3pm)					User Contributed Perl Documentation				     Email::MessageID(3pm)

NAME

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

SYNOPSIS

	 use Email::MessageID;

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

	 print "Message-ID: $midx0Ax0D";

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.

perl v5.10.1							    2010-07-15						     Email::MessageID(3pm)