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Mark Overmeer > Mail-Box-2.102 > Mail::Transport::SMTP



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Module Version: 2.102   Source   Latest Release: Mail-Box-2.120


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


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


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

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


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.



 -Option    --Defined in     --Default
  executable  Mail::Transport  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'
executable => FILENAME
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.

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.


Sending mail


See "Sending mail" in Mail::Transport::Send


See "Sending mail" in Mail::Transport::Send

$obj->send(MESSAGE, OPTIONS)

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 five values:

 (success, error code, error text, error location, quit success)

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

  from    < >
  to      []
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".


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.

Server connection


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])

See "Server connection" in Mail::Transport


See "Server connection" in Mail::Transport


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.

Error handling


See "Error handling" in Mail::Reporter


See "Error handling" in Mail::Reporter


See "Error handling" in Mail::Reporter


See "Error handling" in Mail::Reporter

$obj->log([LEVEL [,STRINGS]])
Mail::Transport::SMTP->log([LEVEL [,STRINGS]])

See "Error handling" in Mail::Reporter


See "Error handling" in Mail::Reporter


See "Error handling" in Mail::Reporter


See "Error handling" in Mail::Reporter


See "Error handling" in Mail::Reporter


See "Error handling" in Mail::Reporter


See "Error handling" in Mail::Reporter


See "Error handling" in Mail::Reporter



See "Cleanup" in Mail::Reporter


See "Cleanup" in Mail::Reporter


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.


This module is part of Mail-Box distribution version 2.102, built on January 04, 2012. Website:


Copyrights 2001-2012 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

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