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Postmark Gem

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This gem is an official wrapper for Postmark HTTP API. Use it to send emails and retrieve info about bounces.

Getting Started

Install the gem

gem install postmark

Install Mail library

In addition to the postmark gem you also need to install mail gem.

gem install mail

You can also use the gem with tmail library. This is not recommended for any new projects, but may be useful for legacy Ruby 1.8.7 projects.

Get Postmark API key

In order to send emails using Postmark ruby gem, you will need a Postmark account. If you don't have one please register at https://postmarkapp.com/sign_up.

If you didn't create any servers yet, please create one, proceed to Credentials tab and copy an API key. API keys should be frequently rotated for security reasons.

Using with Mail library

Make sure you have a sender signature for every From email you specify. From can also accept array of addresses.

Plain text message

require 'rubygems'
require 'postmark'
require 'mail'
require 'json'

message = Mail.new do
  from            '[email protected]'
  to              'Leonard Hofstadter <[email protected]>'
  subject         'Re: Come on, Sheldon. It will be fun.'
  body            'That\'s what you said about the Green Lantern movie. You' \
                  'were 114 minutes of wrong.'

  delivery_method Mail::Postmark, :api_key => 'your-postmark-api-key'
end

message.deliver
# => #<Mail::Message:70355890541720, Multipart: false, Headers: <From: [email protected]>, <To: [email protected]>, <Message-ID: e439fec0-4c89-475b-b3fc-eb446249a051>, <Subject: Re: Come on, Sheldon. It will be fun.>>

HTML message

require 'rubygems'
require 'postmark'
require 'mail'
require 'json'

message = Mail.new do
  from            '[email protected]'
  to              'Leonard Hofstadter <[email protected]>'
  subject         'Re: What, to you, is a large crowd?'

  content_type    'text/html; charset=UTF-8'
  body            '<p>Any group big enough to trample me to death. General ' \
                  'rule of thumb is 36 adults or 70 children.</p>'

  delivery_method Mail::Postmark, :api_key => 'your-postmark-api-key'
end

message.deliver
# => #<Mail::Message:70355902117460, Multipart: false, Headers: <From: [email protected]>, <To: [email protected]>, <Message-ID: 3a9370a2-6c24-4304-a03c-320a54cc59f7>, <Subject: Re: What, to you, is a large crowd?>, <Content-Type: text/html; charset=UTF-8>>

Message with attachments

message = Mail.new do
  from            '[email protected]'
  to              'Dr. Sheldon Cooper <[email protected]>'
  subject         'Have you seen these pictures of yours?'
  body            'You look like a real geek!'
  add_file        '1.jpeg'

  delivery_method Mail::Postmark, :api_key => 'your-postmark-api-key'
end

message.attachments['sheldon.jpeg'] = File.read('2.jpeg')

message.deliver
# => #<Mail::Message:70185826686240, Multipart: true, Headers: <From: [email protected]>, <To: [email protected]>, <Message-ID: ba644cc1-b5b1-4bcb-aaf8-2f290b5aad80>, <Subject: Have you seen these pictures of yours?>, <Content-Type: multipart/mixed; boundary=--==_mimepart_5121f9f1ec653_12c53fd569035ad817726>> 

Multipart message

You can send multipart messages containing both text and HTML using Postmark gem.

require 'rubygems'
require 'postmark'
require 'mail'
require 'json'

message = Mail.new do
  from            '[email protected]'
  to              'Leonard Hofstadter <[email protected]>'
  subject         'Re: Anything Can Happen Thursday'
  delivery_method Mail::Postmark, :api_key => 'your-postmark-api-key'

  text_part do
    body          'Apparently the news didn\'t reach my digestive system,' \
                  ' which when startled has it\'s own version of "Anything' \
                  ' Can Happen Thursday"'
  end

  html_part do
    content_type  'text/html; charset=UTF-8'
    body          '<p>Apparently the news didn&rsquo;t reach my digestive ' \
                  'system, which when startled has it&rsquo;s own version ' \
                  'of &ldquo;Anything Can Happen Thursday&rdquo;</p>'
  end
end

message.deliver
# => #<Mail::Message:70355901588620, Multipart: true, Headers: <From: [email protected]>, <To: [email protected]>, <Message-ID: cadba131-f6d6-4cfc-9892-16ee738ba54c>, <Subject: Re: Anything Can Happen Thursday>, <Content-Type: multipart/alternative; boundary=--==_mimepart_50ef7a6234a69_a4c73ffd01035adc207b8>>

Tagged message

Postmark also lets you tag your messages.

require 'rubygems'
require 'postmark'
require 'mail'
require 'json'

message = Mail.new do
  from           '[email protected]'
  to             'Penny <[email protected]>'
  subject        'Re: You cleaned my apartment???'
  body           'I couldn\'t sleep knowing that just outside my bedroom is ' \
                 'our living room and just outside our living room is that ' \
                 'hallway and immediately adjacent to that hallway is this!'

  delivery_method Mail::Postmark, :api_key => 'your-postmark-api-key'
end

message.tag = 'confidential'

message.deliver
# => #<Mail::Message:70168327829580, Multipart: false, Headers: <From: [email protected]>, <To: [email protected]>, <Message-ID: af2570fd-3481-4b45-8b27-a249806d891a>, <Subject: Re: You cleaned my apartment???>, <TAG: confidential>>

Accessing Postmark Message-ID

You might want to save identifiers of messages you send. Postmark provides you with unique Message-ID, which you can use to retrieve bounces later. This example shows you how to access Message-ID of a sent email message.

message = Mail.new
# ...
message.deliver

message['Message-ID']
# => cadba131-f6d6-4cfc-9892-16ee738ba54c
message.message_id
# => "cadba131-f6d6-4cfc-9892-16ee738ba54c"

Using with TMail library

Postmark gem also supports tmail library, which can be used by Ruby 1.8.7 users working on legacy projects. Please note that TMail is not supported since 2010, so please consider using new ruby mail library for all your new projects.

Make sure you have a sender signature for every From email you specify. From can also accept array of addresses.

require 'rubygems'
require 'postmark'
require 'tmail'
require 'json'

Postmark.api_key = 'your-postmark-api-key'

message              = TMail::Mail.new
message.from         = "[email protected]"
message.to           = "Sheldon Cooper <[email protected]>"
message.subject      = "Hi Sheldon!"
message.content_type = "text/html"
message.body         = "Hello my friend!"

# You can set customer headers if you like:
message["CUSTOM-HEADER"] = "my custom header value"

# Added a tag:
message.tag = "my-tracking-tag"

# Add attachments:
message.postmark_attachments = [File.open("/path"), File.open("/path")]

# Add attachments with content generated on the fly:
message.postmark_attachments = [{
  "Name" => "September 2011.pdf",
  "Content" => [pdf_content].pack("m"),
  "ContentType" => "application/pdf"
}]

# Or specify a reply-to address (can also be an array of addresses):
message.reply_to = "[email protected]"

Postmark.send_through_postmark(message)

Exploring Other API Features

You can retrieve various information about your server state using the Public bounces API.

require 'rubygems'
require 'postmark'
require 'mail'
require 'json'

Postmark.response_parser_class = :Json
Postmark.api_key = 'your-postmark-api-key'

# Delivery stats
Postmark.delivery_stats
# => {"InactiveMails"=>1, "Bounces"=>[{"Name"=>"All", "Count"=>1}, {"Type"=>"HardBounce", "Name"=>"Hard bounce", "Count"=>1}]}

# Get bounces information: (array of bounce objects)
Postmark::Bounce.all
# => [#<Postmark::Bounce:0x007ff09c04ae18 @id=580516117, @email="[email protected]", @bounced_at=2012-10-21 00:01:56 +0800, @type="HardBounce", @name=nil, @details="smtp;550 5.1.1 The email account that you tried to reach does not exist. Please try double-checking the recipient's email address for typos or unnecessary spaces. Learn more at http://support.google.com/mail/bin/answer.py?answer=6596 c13si5382730vcw.23", @tag=nil, @dump_available=false, @inactive=true, @can_activate=true, @message_id="876d40fe-ab2a-4925-9d6f-8d5e4f4926f5", @subject="Re: What, to you, is a large crowd?">]

# Find specific bounce by id:
bounce = Postmark::Bounce.find(5)
# => #<Postmark::Bounce:0x007ff09c04ae18 @id=580516117, @email="[email protected]", @bounced_at=2012-10-21 00:01:56 +0800, @type="HardBounce", @name=nil, @details="smtp;550 5.1.1 The email account that you tried to reach does not exist. Please try double-checking the recipient's email address for typos or unnecessary spaces. Learn more at http://support.google.com/mail/bin/answer.py?answer=6596 c13si5382730vcw.23", @tag=nil, @dump_available=false, @inactive=true, @can_activate=true, @message_id="876d40fe-ab2a-4925-9d6f-8d5e4f4926f5", @subject="Re: What, to you, is a large crowd?">

bounce.dump     # string, containing raw SMTP data
# => "Return-Path: <>\r\nDate: Sun, 21 Oct 2012 01:00:04 -0400\r\nFrom: [email protected]\r\n..."

bounce.activate # reactivate hard bounce
# => #<Postmark::Bounce:0x007ff09c04ae18 @id=580516117, @email="[email protected]", @bounced_at=2012-10-21 00:01:56 +0800, @type="HardBounce", @name=nil, @details="smtp;550 5.1.1 The email account that you tried to reach does not exist. Please try double-checking the recipient's email address for typos or unnecessary spaces. Learn more at http://support.google.com/mail/bin/answer.py?answer=6596 c13si5382730vcw.23", @tag=nil, @dump_available=false, @inactive=true, @can_activate=true, @message_id="876d40fe-ab2a-4925-9d6f-8d5e4f4926f5", @subject="Re: What, to you, is a large crowd?">

Security

To use SSL encryption when sending email configure the library as follows:

Postmark.secure = true

Requirements

The gem relies on Mail or TMail for building the message. You will also need postmark account, server and sender signature set up to use it. If you plan using it in a rails project, check out the postmark-rails gem, which is meant to integrate with ActionMailer.

The plugin will try to use ActiveSupport Json if it is already included. If not, it will attempt using the built-in ruby Json library.

You can also explicitly specify which one to be used, using

Postmark.response_parser_class = :Json # :ActiveSupport or :Yajl are also supported.

Note on Patches/Pull Requests

  • Fork the project.
  • Make your feature addition or bug fix.
  • Add tests for it. This is important so I don't break it in a future version unintentionally.
  • Commit, do not mess with rakefile, version, or history.
  • Send me a pull request. Bonus points for topic branches.

Authors & Contributors

  • Petyo Ivanov
  • Ilya Sabanin
  • Artem Chistyakov
  • Hristo Deshev
  • Dmitry Sabanin
  • Randy Schmidt
  • Chris Williams
  • Aitor García Rey
  • James Miller
  • Yury Batenko
  • Pavel Maksimenko
  • Anton Astashov
  • Marcus Brito
  • Tyler Hunt

Copyright

Copyright © 2013 Wildbit LLC. See LICENSE for details.

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Ruby gem for sending emails through http://postmarkapp.com HTTP API

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