# iOS devices do not display html emails with attachments as you would expect / like. This code will send emails that iOS devices will correctly display

html_email_with_attachments.rb

# iOS devices do not display html emails with attachments as you would expect / like
# This code will send emails that iOS devices will correctly display
# Written by Steve Brett based on code by Chris Parsons

# Worked for me with Ruby 2 and mail 2.5.4

require 'rubygems'
require 'mail'

Mail.defaults do
	  # Set up mail delivery
	  delivery_method   :smtp,
	  #address:  'mailserver',
	  #port: 999,
	  #user_name:  'xxxxxx',
	  #password:  'xxxxx',
	  #domain:    'domain.com',
	  #authentication: :plain
	end
	
mail=Mail.new do |mail|
  to      'reipient@example.com'
  from    'Fred Flintstone <fred@flintstones.com>'
  subject 'Multipart email with attachment'
end

# Remember to end the plain text with a few blank lines. iOS devices often display the content of the attachments so you want to force them to go below the text

# Create the text and html as separate mail parts
text_body = Mail::Part.new do
	body "This is the message\n\n"
	content_type 'text/plain; '
end
html_body  = Mail::Part.new do
	body "<h1>This is HTML</h1>"
	content_type 'text/html; charset=UTF-8'
end

# Create a mail part to hold the html and plain text
bodypart = Mail::Part.new
bodypart.text_part = text_body
bodypart.html_part = html_body

# Add the html and plain text to the email
mail.add_part bodypart

# Add the attachment(s)
attachment = "../path/to/doc.pdf"
mail.attachments["#{File.basename(attachment)}"] = File.read(attachment)

# Send the email
mail.deliver!

Thanks a million!

Thanks, this solution is still required today! This gist should be an example in the documentation as this is the only proper solution that supports Apple clients!