Mail::Transport::SMTP - transmit messages without external program

       This module implements transport of "Mail::Message" objects by negotiating to the destination host
       directly by using the SMTP protocol, without help of "sendmail", "mail", or other programs on the local
       host.

       warning: you may need to install Net::SMTPS, to get TLS support.

       Extends "DESCRIPTION" in Mail::Transport::Send.

       Warning: Message has no destination
           It was not possible to figure-out where the message is intended to go to.

       Notice: No addresses found to send the message to, no connection made
       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.

       Warning: Resent group does not specify a destination
           The   message   which   is   sent   is   the   result   of   a  bounce  (for  instance  created  with
           Mail::Message::bounce()), and therefore starts with a "Received" header field.   With  the  "bounce",
           the  new  destination(s)  of  the  message  are  given,  which  should  be  included  as "Resent-To",
           "Resent-Cc", and "Resent-Bcc".

           The "To", "Cc", and "Bcc" header information is only used if no "Received" was found.  That seems  to
           be the best explanation of the RFC.

           As  alternative,  you  may  also  specify  the  "to"  option  to  some  of  the senders (for instance
           Mail::Transport::SMTP::send(to) to overrule any information found in the  message  itself  about  the
           destination.

        Mail::Transport::SMTP
          is a Mail::Transport::Send
          is a Mail::Transport
          is a Mail::Reporter

       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/

perl v5.36.0                                       2022-10-14                         Mail::Transport::SMTP(3pm)

       Extends "METHODS" in Mail::Transport::Send.

   Constructors
       Extends "Constructors" in Mail::Transport::Send.

       Mail::Transport::SMTP->new(%options)
            -Option       --Defined in     --Default
             esmtp_options                   {}
             executable     Mail::Transport  undef
             from                            undef
             helo                            <from Net::Config>
             hostname       Mail::Transport  <from Net::Config>
             interval       Mail::Transport  30
             log            Mail::Reporter   'WARNINGS'
             password                        undef
             port           Mail::Transport  25
             proxy          Mail::Transport  <from Net::Config>
             retry          Mail::Transport  <false>
             smtp_debug                      <false>
             timeout                         120
             trace          Mail::Reporter   'WARNINGS'
             username                        undef
             via            Mail::Transport  'smtp'

           esmtp_options => HASH
             [2.116]  ESMTP  options  to  pass  to Net::SMTP.  See the Net::SMTP documentation for full details.
             Options can also be passed at send time.  For example: "{ XVERP => 1 }"

           executable => FILENAME
           from => ADDRESS
             Allows a default sender address to be specified globally.  See trySend() for full details.

           helo => HOST
             The fully qualified name of the sender's host (your system) which is used for the greeting  message
             to  the  receiver.   If  not  specified, Net::Config or else Net::Domain are questioned to find it.
             When even these do not supply a valid name, the name of the  domain  in  the  "From"  line  of  the
             message is assumed.

           hostname => HOSTNAME|ARRAY
           interval => SECONDS
           log => LEVEL
           password => STRING
             The password to be used with the new(username) to log in to the remote server.

           port => INTEGER
           proxy => PATH
           retry => NUMBER|undef
           smtp_debug => BOOLEAN
             Simulate transmission: the SMTP protocol output will be sent to your screen.

           timeout => SECONDS
             The number of seconds to wait for a valid response from the server before failing.

           trace => LEVEL
           username => STRING
             Use  SASL authentication to contact the remote SMTP server (RFC2554).  This username in combination
             with new(password) is passed as arguments to Net::SMTP method auth.  Other forms of  authentication
             are not supported by Net::SMTP.  The "username" can also be specified as an Authen::SASL object.

           via => CLASS|NAME

   Sendingmail
       Extends "Sending mail" in Mail::Transport::Send.

       $obj->destinations( $message, [$address|ARRAY] )
           Inherited, see "Sending mail" in Mail::Transport::Send

       $obj->putContent($message, $fh, %options)
           Inherited, see "Sending mail" in Mail::Transport::Send

       $obj->send($message, %options)
           Inherited, see "Sending mail" in Mail::Transport::Send

       $obj->trySend($message, %options)
           Try  to  send  the $message once.   This may fail, in which case this method will return "false".  In
           list context, the reason for failure can be caught: in list context "trySend" will return a  list  of
           six values:

            (success, rc, rc-text, error location, quit success, accept)

           Success  and  quit  success  are  booleans.  The error code and -text are protocol specific codes and
           texts.  The location tells where the problem occurred.

           [3.003] the 'accept' returns the message of the dataend()  instruction.   Some  servers  may  provide
           useful  information  in  there,  like  an internal message registration id.  For example, postfix may
           return "2.0.0 Ok: queued as 303EA380EE".  You can only use this parameter when running local delivery
           (which is a smart choice anyway)

            -Option       --Default
             esmtp_options  {}
             from           < >
             to             []

           esmtp_options => HASH
             Additional or overridden EMSTP options. See new(esmtp_options)

           from => ADDRESS
             Your  own  identification.   This  may  be  fake.    If   not   specified,   it   is   taken   from
             Mail::Message::sender(),  which means the content of the "Sender" field of the message or the first
             address of the "From" field.  This defaults to "< >", which represents "no address".

           to => ADDRESS|[ADDRESSES]
             Alternative destinations.  If not specified, the "To", "Cc" and "Bcc"  fields  of  the  header  are
             used.  An address is a string or a Mail::Address object.

   Serverconnection
       Extends "Server connection" in Mail::Transport::Send.

       $obj->contactAnyServer()
           Creates  the  connection  to  the  SMTP server.  When more than one hostname was specified, the first
           which accepts a connection is taken.  An IO::Socket::INET object is returned.

       $obj->findBinary( $name, [@directories] )
           Inherited, see "Server connection" in Mail::Transport

       $obj->remoteHost()
           Inherited, see "Server connection" in Mail::Transport

       $obj->retry()
           Inherited, see "Server connection" in Mail::Transport

       $obj->tryConnectTo($host, %options)
           Try to establish a connection to deliver SMTP to the specified $host.  The %options are passed to the
           "new" method of Net::SMTP.

   Errorhandling
       Extends "Error handling" in Mail::Transport::Send.

       $obj->AUTOLOAD()
           Inherited, see "Error handling" in Mail::Reporter

       $obj->addReport($object)
           Inherited, see "Error handling" in Mail::Reporter

       $obj->defaultTrace( [$level]|[$loglevel, $tracelevel]|[$level, $callback] )
       Mail::Transport::SMTP->defaultTrace( [$level]|[$loglevel, $tracelevel]|[$level, $callback] )
           Inherited, see "Error handling" in Mail::Reporter

       $obj->errors()
           Inherited, see "Error handling" in Mail::Reporter

       $obj->log( [$level, [$strings]] )
       Mail::Transport::SMTP->log( [$level, [$strings]] )
           Inherited, see "Error handling" in Mail::Reporter

       $obj->logPriority($level)
       Mail::Transport::SMTP->logPriority($level)
           Inherited, see "Error handling" in Mail::Reporter

       $obj->logSettings()
           Inherited, see "Error handling" in Mail::Reporter

       $obj->notImplemented()
           Inherited, see "Error handling" in Mail::Reporter

       $obj->report( [$level] )
           Inherited, see "Error handling" in Mail::Reporter

       $obj->reportAll( [$level] )
           Inherited, see "Error handling" in Mail::Reporter

       $obj->trace( [$level] )
           Inherited, see "Error handling" in Mail::Reporter

       $obj->warnings()
           Inherited, see "Error handling" in Mail::Reporter

   Cleanup
       Extends "Cleanup" in Mail::Transport::Send.

       $obj->DESTROY()
           Inherited, see "Cleanup" in Mail::Reporter

       Mail::Transport::SMTP - transmit messages without external program

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

        my $sender = Mail::Transport::SMTP->new(...);
        $sender->send($message);

        $message->send(via => 'smtp');