Method: Mail::Message#initialize

Defined in:
lib/mail/message.rb

#initialize(*args, &block) ⇒ Message

Making an email

You can make an new mail object via a block, passing a string, file or direct assignment.

Making an email via a block

mail = Mail.new do |m|
  m.from '[email protected]'
  m.to '[email protected]'
  m.subject 'This is a test email'
  m.body File.read('body.txt')
end

mail.to_s #=> "From: [email protected]\r\nTo: you@...

If may also pass a block with no arguments, in which case it will be evaluated in the scope of the new message instance:

mail = Mail.new do
  from '[email protected]'
  # …
end

Making an email via passing a string

mail = Mail.new("To: [email protected]\r\nSubject: Hello\r\n\r\nHi there!")
mail.body.to_s #=> 'Hi there!'
mail.subject   #=> 'Hello'
mail.to        #=> '[email protected]'

Making an email from a file

mail = Mail.read('path/to/file.eml')
mail.body.to_s #=> 'Hi there!'
mail.subject   #=> 'Hello'
mail.to        #=> '[email protected]'

Making an email via assignment

You can assign values to a mail object via four approaches:

  • Message#field_name=(value)

  • Message#field_name(value)

  • Message#=(value)

  • Message#=(value)

Examples:

mail = Mail.new
mail['from'] = '[email protected]'
mail[:to]    = '[email protected]'
mail.subject 'This is a test email'
mail.body    = 'This is a body'

mail.to_s #=> "From: [email protected]\r\nTo: you@...



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# File 'lib/mail/message.rb', line 109

def initialize(*args, &block)
  @body = nil
  @body_raw = nil
  @separate_parts = false
  @text_part = nil
  @html_part = nil
  @errors = nil
  @header = nil
  @charset = self.class.default_charset
  @defaulted_charset = true

  @smtp_envelope_from = nil
  @smtp_envelope_to = nil

  @perform_deliveries = true
  @raise_delivery_errors = true

  @delivery_handler = nil

  @delivery_method = Mail.delivery_method.dup

  @transport_encoding = Mail::Encodings.get_encoding('7bit')

  @mark_for_delete = false

  if args.flatten.first.respond_to?(:each_pair)
    init_with_hash(args.flatten.first)
  else
    init_with_string(args.flatten[0].to_s)
  end

  # Support both builder styles:
  #
  #   Mail.new do
  #     to '[email protected]'
  #   end
  #
  # and
  #
  #   Mail.new do |m|
  #     m.to '[email protected]'
  #   end
  if block_given?
    if block.arity.zero? || (RUBY_VERSION < '1.9' && block.arity < 1)
      instance_eval(&block)
    else
      yield self
    end
  end

  self
end