# phpman > man > Mail::Transport

## NAME
    [Mail::Transport](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ATransport/markdown) - use Mail Transfer Agents (MTAs)

## INHERITANCE
     [Mail::Transport](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ATransport/markdown)
       is a [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown)

     [Mail::Transport](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ATransport/markdown) is extended by
       [Mail::Transport::Receive](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ATransport%3A%3AReceive/markdown)
       [Mail::Transport::Send](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ATransport%3A%3ASend/markdown)

## SYNOPSIS
     my $message = [Mail::Message](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage/markdown)->new(...);

     # Some extensions implement sending:
     $message->send;
     $message->send(via => 'sendmail');

     my $sender = [Mail::Transport::SMTP](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ATransport%3A%3ASMTP/markdown)->new(...);
     $sender->send($message);

     # Some extensions implement receiving:
     my $receiver = [Mail::Transport::POP3](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ATransport%3A%3APOP3/markdown)->new(...);
     $message = $receiver->receive;

## DESCRIPTION
    Objects which extend "[Mail::Transport](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ATransport/markdown)" implement sending and/or receiving of messages, using
    various protocols.

    [Mail::Transport::Send](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ATransport%3A%3ASend/markdown) extends this class, and offers general functionality for send protocols,
    like SMTP. [Mail::Transport::Receive](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ATransport%3A%3AReceive/markdown) also extends this class, and offers receive method. Some
    transport protocols will implement both sending and receiving.

    Extends "DESCRIPTION" in [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown).

## METHODS
    Extends "METHODS" in [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown).

### Constructors
    Extends "Constructors" in [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown).

    [Mail::Transport](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ATransport/markdown)->new(%options)
         -Option    --Defined in     --Default
          executable                   undef
          hostname                     'localhost'
          interval                     30
          log         [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown)   'WARNINGS'
          password                     undef
          port                         undef
          proxy                        undef
          retry                        <false>
          timeout                      120
          trace       [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown)   'WARNINGS'
          username                     undef
          via                          'sendmail'

        executable => FILENAME
          If you specify an executable, the module does not need to search the system directories to
          figure-out where the client lives. Using this decreases the flexible usage of your
          program: moving your program to other systems may involve changing the path to the
          executable, which otherwise would work auto-detect and unmodified.

        hostname => HOSTNAME|ARRAY
          The host on which the server runs. Some protocols accept an ARRAY of alternatives for this
          option.

        interval => SECONDS
          The time between tries to contact the remote server for sending or receiving a message in
          SECONDS. This number must be larger than 0.

        log => LEVEL
        password => STRING
          Some protocols require a password to be given, usually in combination with a password.

        port => INTEGER
          The port number behind which the service is hiding on the remote server.

        proxy => PATH
          The name of the proxy software (the protocol handler). This must be the name (preferable
          the absolute path) of your mail delivery software.

        retry => NUMBER|undef
          The number of retries before the sending will fail. If "undef", the number of retries is
          unlimited.

        timeout => SECONDS
          SECONDS till time-out while establishing the connection to a remote server.

        trace => LEVEL
        username => STRING
          Some protocols require a user to login.

        via => CLASS|NAME
          Which CLASS (extending "[Mail::Transport](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ATransport/markdown)") will transport the data. Some predefined NAMEs
          avoid long class names: "mail" and "mailx" are handled by the [Mail::Transport::Mailx](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ATransport%3A%3AMailx/markdown)
          module, "sendmail" and "postfix" belong to [Mail::Transport::Sendmail](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ATransport%3A%3ASendmail/markdown), and "smtp" is
          implemented in [Mail::Transport::SMTP](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ATransport%3A%3ASMTP/markdown).

          The "pop" or "pop3" protocol implementation can be found distribution
          [Mail::Transport::POP3](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ATransport%3A%3APOP3/markdown). For "imap" or "imap4", install [Mail::Transport::IMAP4](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ATransport%3A%3AIMAP4/markdown).

### Server connection
    $obj->findBinary( $name, [@directories] )
        Look for a binary with the specified $name in the directories which are defined to be safe.
        The list of standard directories is followed by the optional @directories. The full pathname
        is returned.

        You may specify new(proxy), which specifies the absolute name of the binary to be used.

    $obj->remoteHost()
        Returns the hostname, port number, username and password to be used to establish the
        connection to the server for sending or receiving mail.

    $obj->retry()
        Returns the retry interval, retry count, and timeout for the connection.

### Error handling
    Extends "Error handling" in [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown).

    $obj->AUTOLOAD()
        Inherited, see "Error handling" in [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown)

    $obj->addReport($object)
        Inherited, see "Error handling" in [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown)

    $obj->defaultTrace( [$level]|[$loglevel, $tracelevel]|[$level, $callback] )
    [Mail::Transport](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ATransport/markdown)->defaultTrace( [$level]|[$loglevel, $tracelevel]|[$level, $callback] )
        Inherited, see "Error handling" in [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown)

    $obj->errors()
        Inherited, see "Error handling" in [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown)

    $obj->log( [$level, [$strings]] )
    [Mail::Transport](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ATransport/markdown)->log( [$level, [$strings]] )
        Inherited, see "Error handling" in [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown)

    $obj->logPriority($level)
    [Mail::Transport](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ATransport/markdown)->logPriority($level)
        Inherited, see "Error handling" in [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown)

    $obj->logSettings()
        Inherited, see "Error handling" in [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown)

    $obj->notImplemented()
        Inherited, see "Error handling" in [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown)

    $obj->report( [$level] )
        Inherited, see "Error handling" in [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown)

    $obj->reportAll( [$level] )
        Inherited, see "Error handling" in [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown)

    $obj->trace( [$level] )
        Inherited, see "Error handling" in [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown)

    $obj->warnings()
        Inherited, see "Error handling" in [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown)

### Cleanup
    Extends "Cleanup" in [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown).

    $obj->DESTROY()
        Inherited, see "Cleanup" in [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown)

## DIAGNOSTICS
    Warning: Avoid program abuse: specify an absolute path for $exec.
        Specifying explicit locations for executables of email transfer agents should only be done
        with absolute file names, to avoid various pontential security problems.

    Warning: Executable $exec does not exist.
        The explicitly indicated mail transfer agent does not exists. The normal settings are used
        to find the correct location.

    Error: Package $package does not implement $method.
        Fatal error: the specific package (or one of its superclasses) does not implement this
        method where it should. This message means that some other related classes do implement this
        method however the class at hand does not. Probably you should investigate this and probably
        inform the author of the package.

## SEE ALSO
    This module is part of Mail-Transport distribution version 3.005, built on July 22, 2020.
    Website: <http://perl.overmeer.net/CPAN/>

## LICENSE
    Copyrights 2001-2020 by [Mark Overmeer]. For other contributors see ChangeLog.

    This program is free software; you can redistribute it and/or modify it under the same terms as
    Perl itself. See <http://dev.perl.org/licenses/>