# MailSlurp Ruby Client

Create real email addresses on demand. Send and receive emails and attachments from code and tests using Ruby.

MailSlurp is an email API service that lets you create real email addresses in code. You can then send and receive emails and attachments in Ruby applications and tests.

# Quick links

# Get started

TIP

This section describes how to get up and running with the Ruby client.

See the examples page (opens new window) for more examples and use with common frameworks such as Rails and RSpec.

See the method documentation for a list of all functions

# Create API Key

First you'll need an API Key. Create a free account (opens new window) and copy the key from your dashboard.

# Ruby requirements

The MailSlurp client requires Ruby 2.x and the ruby-dev package. You most likely have these packages but if not:

sudo apt-get install ruby-dev

# Install Gem

gem install mailslurp_client

Or in your Gemfile:

gem 'mailslurp_client', '~> 8.2', '>= 8.2.2'

And then run bundler install:

gem install bundler
bundle install

# Configure the client

require 'mailslurp_client'
# configure mailslurp client globally with API key (or pass each controller a client instance)
MailSlurpClient.configure do |config|
    config.api_key['x-api-key'] = "YOUR_API_KEY_HERE"
end

# Common uses

MailSlurp can be used for anything email related: sending and receiving emails, creating email addresses, or testing email processes.

Here are some common uses:

# Create inboxes

To use MailSlurp you need to create inboxes. These are email accounts that have an ID and a real email address.

inbox_controller = MailSlurpClient::InboxControllerApi.new
inbox = inbox_controller.create_inbox

In a test:

it 'can create email addresses' do
    inbox_controller = MailSlurpClient::InboxControllerApi.new
    inbox = inbox_controller.create_inbox
    expect(inbox.id).not_to be_nil
    expect(inbox.email_address).to include("mailslurp.com")
end

# List inboxes

Inboxes you create can be listed in a paginated way.

it 'can list inboxes' do
    inbox_controller = MailSlurpClient::InboxControllerApi.new
    paged_inboxes = inbox_controller.get_all_inboxes({ page: 0, size: 20 })
    # assert on pagination fields
    expect(paged_inboxes.content).not_to be_empty
    expect(paged_inboxes.number).to be(0)
    expect(paged_inboxes.size).to be(20)
    # can access inbox result
    expect(paged_inboxes.content[0].id).not_to be_empty
end

# Send emails

You can send HTML emails easily with the inbox controller. First create an inbox then use its ID with the send_email method. To send attachments see the Method Documentation.

# create an inbox
inbox_controller = MailSlurpClient::InboxControllerApi.new
inbox = inbox_controller.create_inbox
# send an email from the inbox
inbox_controller.send_email(inbox.id, {
    send_email_options: {
        to: ["test@example.org"],
        subject: "Test",
        isHTML: true,
        body: <<-HEREDOC
          <h1>Hello!</h1>
          <p>MailSlurp supports HTML</p>
        HEREDOC
    }
})

You can also use objects for most method options:

# for send options see https://github.com/mailslurp/mailslurp-client-ruby/blob/master/docs/SendEmailOptions.md
opts = {
  send_email_options: MailSlurpClient::SendEmailOptions.new(
    {
      to: [inbox_2.email_address],
      subject: 'Test email',
      from: inbox_1.email_address,
      body: 'Test email content',
      is_html: true,
      attachments: attachment_ids
    }
  )
}
inbox_controller.send_email(inbox_1.id, opts)

# Receive emails

You can use MailSlurp to wait for at least 1 unread email in an inbox and return it. If a timeout is exceeded it will throw an error instead:

waitfor_controller = MailSlurpClient::WaitForControllerApi.new
email = waitfor_controller.wait_for_latest_email({ inbox_id: inbox.id, unread_only: true, timeout: 30_000 })
# verify email contents
expect(email.subject).to include("Test")
expect(email.body).to include("Your email body")

# Attachments

You can send attachments by first uploading files with the AttachmentControllerApi then using the returned attachment IDs in the send email method.

TIP

MailSlurp endpoints use base64 string encoding for upload and download files. To encode or decode strings in Ruby make sure you use the strict variables that avoid added newlines.

# Upload and send

# upload a file to mailslurp to use as attachment
# @return [Array&lt;String&gt;]
def upload_file
# read a file to upload
data = File.open(PATH_TO_ATTACHMENT).read
# encode the data as base64 string (must be strict to avoid ruby adding new line characters)
encoded = Base64.strict_encode64(data)
attachment_controller = MailSlurpClient::AttachmentControllerApi.new
upload_options = MailSlurpClient::UploadAttachmentOptions.new(
  {
    base64_contents: encoded,
    content_type: 'text/plain',
    filename: 'attachment.txt'
  }
)
# return list of attachment ids
attachment_controller.upload_attachment(upload_options)
end

To send attachments

attachment_ids = upload_file
opts = {
  send_email_options: MailSlurpClient::SendEmailOptions.new(
    {
      to: [inbox_2.email_address],
      subject: 'Test email',
      from: inbox_1.email_address,
      body: 'Test email content',
      is_html: true,
      attachments: attachment_ids
    }
  )
}
inbox_controller.send_email(inbox_1.id, opts)

# Download received attachments

 # wait for the email to arrive (or fetch directly using email controller if you know it is there)
wait_opts = {
  inbox_id: inbox_2.id,
  timeout: 30_000,
  unread_only: true
}
email = wait_controller.wait_for_latest_email(wait_opts)
# find the attachments on the email object
expect(email.attachments.size).to be(1)
# download the attachment
email_controller = MailSlurpClient::EmailControllerApi.new
downloaded_attachment = email_controller.download_attachment_base64(email.attachments[0], email.id)
# extract attachment content
expect(downloaded_attachment.content_type).to eq("text/plain")
expect(downloaded_attachment.size_bytes).to be_truthy
expect(downloaded_attachment.base64_file_contents).to be_truthy

# Examples

# Send email between two inboxes

It is common to use MailSlurp in test environments. Here is an example RSpec test:


require 'mailslurp_client'
# read mailslurp api key from environment variables
API_KEY = ENV['API_KEY']
describe 'use MailSlurp ruby sdk to create email addresses then send and receive email' do
  before(:all) do
    expect(API_KEY).to be_truthy
    # configure mailslurp with API key
    MailSlurpClient.configure do |config|
      config.api_key['x-api-key'] = API_KEY
    end
  end
  it 'can an inbox with an email address' do
    # create a new email address
    inbox_controller = MailSlurpClient::InboxControllerApi.new
    inbox = inbox_controller.create_inbox
    # has a mailslurp email address
    expect(inbox.id).to be_truthy
    expect(inbox.email_address).to include('@mailslurp.com')
  end
  it 'can send and receive emails' do
    inbox_controller = MailSlurpClient::InboxControllerApi.new
    wait_controller  = MailSlurpClient::WaitForControllerApi.new
    # create two inboxes
    inbox_1 = inbox_controller.create_inbox
    inbox_2 = inbox_controller.create_inbox
    # send email from inbox 1 to inbox 2 (you can send emails to any address)
    # for send options see https://github.com/mailslurp/mailslurp-client-ruby/blob/master/docs/SendEmailOptions.md
    opts = {
      send_email_options: MailSlurpClient::SendEmailOptions.new(
        {
          to: [inbox_2.email_address],
          subject: 'Test email',
          from: inbox_1.email_address,
          body: 'Test email content',
          is_html: true
        }
      )
    }
    inbox_controller.send_email(inbox_1.id, opts)
    expect(inbox_2.id).to be_truthy
    # now wait for the email to arrive
    wait_opts = {
      inbox_id: inbox_2.id,
      timeout: 30_000,
      unread_only: true
    }
    email = wait_controller.wait_for_latest_email(wait_opts)
    expect(email.body).to include('Test email content')
  end
end

# SDK Documentation

See the examples page (opens new window) or the full Method Documentation on Github.