# phpman > man > Mail::Util

## NAME
    [Mail::Util](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AUtil/markdown) - mail utility functions

## INHERITANCE
     [Mail::Util](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AUtil/markdown)
       is a Exporter

## SYNOPSIS
      use [Mail::Util](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AUtil/markdown) qw( ... );

## DESCRIPTION
    This package provides several mail related utility functions. Any function required must by
    explicitly listed on the use line to be exported into the calling package.

## FUNCTIONS
### mailaddress
        Return a guess at the current users mail address. The user can force the return value by
        setting the MAILADDRESS environment variable. [2.10] You may set the $address via the
        parameter.

        WARNING: When not supplied via the environment variable, <mailaddress> looks at various
        configuration files and other environmental data. Although this seems to be smart behavior,
        this is not predictable enough (IMHO) to be used. Please set the MAILADDRESS explicitly, and
        do not trust on the "automatic detection", even when that produces a correct address (on the
        moment)

        example:

         # in your main script
         $ENV{MAILADDRESS} = '<me@example.com>';

         # everywhere else
         use [Mail::Util](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AUtil/markdown) 'mailaddress';
         print mailaddress;

         # since v2.10
         mailaddress "<me@example.com>";

### maildomain
        Attempt to determine the current user mail domain string via the following methods

        *   Look for the MAILDOMAIN environment variable, which can be set from outside the program.
            This is by far the best way to configure the domain.

        *   Look for a sendmail.cf file and extract DH parameter

        *   Look for a smail config file and usr the first host defined in hostname(s)

        *   Try an SMTP connect (if [Net::SMTP](https://www.chedong.com/phpMan.php/perldoc/Net%3A%3ASMTP/markdown) exists) first to mailhost then localhost

        *   Use value from [Net::Domain::domainname](https://www.chedong.com/phpMan.php/perldoc/Net%3A%3ADomain%3A%3Adomainname/markdown) (if [Net::Domain](https://www.chedong.com/phpMan.php/perldoc/Net%3A%3ADomain/markdown) exists)

        WARNING: On modern machines, there is only one good way to provide information to this
        method: the first; always explicitly configure the MAILDOMAIN.

        example:

         # in your main script
         $ENV{MAILDOMAIN} = 'example.com';

         # everywhere else
         use [Mail::Util](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AUtil/markdown) 'maildomain';
         print maildomain;

### read_mbox
        Read $file, a binmail mailbox file, and return a list of references. Each reference is a
        reference to an array containing one message.

        WARNING: This method does not quote lines which accidentally also start with the message
        separator "From", so this implementation can be considered broken. See [Mail::Box::Mbox](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ABox%3A%3AMbox/markdown)

## SEE ALSO
    This module is part of the MailTools distribution, <http://perl.overmeer.net/mailtools/>.

## AUTHORS
    The MailTools bundle was developed by Graham Barr. Later, Mark Overmeer took over maintenance
    without commitment to further development.

    [Mail::Cap](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ACap/markdown) by Gisle Aas <<aas@oslonett.no>>. [Mail::Field::AddrList](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AField%3A%3AAddrList/markdown) by Peter Orbaek <<poe@cit.dk>>.
    [Mail::Mailer](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMailer/markdown) and [Mail::Send](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ASend/markdown) by Tim Bunce <<Tim.Bunce@ig.co.uk>>. For other contributors see
    ChangeLog.

## LICENSE
    Copyrights 1995-2000 Graham Barr <<gbarr@pobox.com>> and 2001-2017 Mark Overmeer
    <<perl@overmeer.net>>.

    This program is free software; you can redistribute it and/or modify it under the same terms as
    Perl itself. See <http://www.perl.com/perl/misc/Artistic.html>