class Net::SMTP

* IOError
* Net::ReadTimeout
* Net::OpenTimeout
* Net::SMTPUnknownError
* Net::SMTPFatalError
* Net::SMTPSyntaxError
* Net::SMTPServerBusy
* Net::SMTPAuthenticationError

This method may raise:

If session has already been started, an IOError will be raised.

=== Errors

started.
(#esmtp=), which must be done before the session is
is probably to set debugging (#set_debug_output) or ESMTP
The primary use of this method (as opposed to SMTP.start)

end
smtp.send_message msgstr, 'from@example.com', ['dest@example.com']
smtp.start(helo: helo_domain, user: account, secret: password, authtype: authtype) do |smtp|
smtp = Net::SMTP.new('smtp.mail.server', 25)
require 'net/smtp'

This is very similar to the class method SMTP.start.

=== Example

responsibility to close the session when finished.
the block call finishes. Otherwise, it is the caller's
object is yielded to the block, and automatically closed after
When this methods is called with a block, the newly-started SMTP

=== Block Usage

in the overview.
:login, :plain, and :cram_md5. See the notes on SMTP Authentication
the type of authentication to attempt; it must be one of
will be attempted using the AUTH command. +authtype+ specifies
If both of +user+ and +secret+ are given, SMTP authentication

the discussion in the overview notes.
+helo+ is the _HELO_ _domain_ that you'll dispatch mails from; see

=== Parameters

Opens a TCP connection and starts the SMTP session.

start(helo = 'localhost', user = nil, secret = nil, authtype = nil) { |smtp| ... }
start(helo: 'localhost', user: nil, secret: nil, authtype: nil) { |smtp| ... }
:call-seq:

def start(*args, helo: nil, user: nil, secret: nil, password: nil, authtype: nil)
  raise ArgumentError, "wrong number of arguments (given #{args.size}, expected 0..4)" if args.size > 4
  helo ||= args[0] || 'localhost'
  user ||= args[1]
  secret ||= password || args[2]
  authtype ||= args[3]
  if defined?(OpenSSL::VERSION)
    ssl_context_params = @ssl_context_params || {}
    unless ssl_context_params.has_key?(:verify_mode)
      ssl_context_params[:verify_mode] = @tls_verify ? OpenSSL::SSL::VERIFY_PEER : OpenSSL::SSL::VERIFY_NONE
    end
    if @tls && @ssl_context_tls.nil?
      @ssl_context_tls = SMTP.default_ssl_context(ssl_context_params)
    end
    if @starttls && @ssl_context_starttls.nil?
      @ssl_context_starttls = SMTP.default_ssl_context(ssl_context_params)
    end
  end
  if block_given?
    begin
      do_start helo, user, secret, authtype
      return yield(self)
    ensure
      do_finish
    end
  else
    do_start helo, user, secret, authtype
    return self
  end
end