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

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

version 1.406

  use Email::MessageID;
  my $mid = Email::MessageID->new->in_brackets;
  print "Message-ID: $mid\x0D\x0A";

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

  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.

  my $domain_part = Email::MessageID->create_host;
This method returns the domain part of the message-id.

  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.

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!
  ],

Casey West <casey@geeknest.com>
Ricardo SIGNES <rjbs@cpan.org>

Aaron Crane <arc@cpan.org>

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.
2015-08-10 perl v5.28.1

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