1Email::MessageID(3)   User Contributed Perl Documentation  Email::MessageID(3)
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NAME

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

9       version 1.406
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SYNOPSIS

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

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

23   new
24         my $mid = Email::MessageID->new;
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26         my $new_mid = Email::MessageID->new( host => $myhost );
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28       This class method constructs an Email::Address object containing a
29       unique message-id. You may specify custom "host" and "user" parameters.
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31       By default, the "host" is generated from "Sys::Hostname::hostname".
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33       By default, the "user" is generated using "Time::HiRes"'s
34       "gettimeofday" and the process ID.
35
36       Using these values we have the ability to ensure world uniqueness down
37       to a specific process running on a specific host, and the exact time
38       down to six digits of microsecond precision.
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40   create_host
41         my $domain_part = Email::MessageID->create_host;
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43       This method returns the domain part of the message-id.
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45   create_user
46         my $local_part = Email::MessageID->create_user;
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48       This method returns a unique local part for the message-id.  It
49       includes some random data and some predictable data.
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51   in_brackets
52       When using Email::MessageID directly to populate the "Message-ID"
53       field, be sure to use "in_brackets" to get the string inside angle
54       brackets:
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56         header => [
57           ...
58           'Message-Id' => Email::MessageID->new->in_brackets,
59         ],
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61       Don't make this common mistake:
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63         header => [
64           ...
65           'Message-Id' => Email::MessageID->new->as_string, # WRONG!
66         ],
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AUTHORS

69       •   Casey West <casey@geeknest.com>
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71       •   Ricardo SIGNES <rjbs@cpan.org>
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CONTRIBUTOR

74       Aaron Crane <arc@cpan.org>
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77       This software is copyright (c) 2004 by Casey West.
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79       This is free software; you can redistribute it and/or modify it under
80       the same terms as the Perl 5 programming language system itself.
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84perl v5.36.0                      2022-07-22               Email::MessageID(3)
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