Mail API

The Mail API is an easy way to send transactional mail messages from your web site, app or any other kind of software. This RESTful API hides all the complicated details of sending SMTP mail.

The built-in tracking mechanisms makes it a powerful tool, so it is easy to see which messages that were successfully delivered and which messages that failed to reach their destinations. Detailed logs makes it simple to diagnose and correct mail sending issues.

All email messages submitted to this API are scanned to prevent sending unwanted content. Messages flagged as either being spam or mailware will be rejected.

However, before you can send any mail, you have to add and verify your sending domains. It is mandatory to set up DNS records for SPF, DKIM and DMARC for each domain. When you add a domain like example.come you are only allowed to send messages from addresses like from this domain.

Send mail


Sends a mail message to one or more recipients.


A message object can contain the following attributes:

Attribute Type Description Required
from string The email address of the sender Yes
to string array A list of recipient email addresses Yes
subject string The message subject Yes
text string The plain text message text Yes
html string The HTML message text
from_name string The name of sender
date date The time when message was sent
reply_to string The email address for replies
cc string array A list of cc email addresses
bcc string array A list of bcc email addresses
attachments string array A list of file attachments (full path)
tags string array A list of tags
charset string The charset (default: "UTF-8")
encoding string The encoding (default: "quoted-printable"). Other values: "base64", "8bit"
require_tls * boolean Whether to require TLS when connecting to the destination host
verify_cert * boolean Whether to verify the SSL certificate of the remote host when connecting
open_tracking * boolean A flag that enables or disables open tracking
click_tracking * boolean A flag that enables or disables click tracking (html message only)
text_click_tracking * boolean A flag that enables or disables click tracking in plain text message (when click_tracking is also enabled)
unsubscribe_tracking * boolean A flag that specifies if an unsubscribe link should be added
test_mode * boolean A flag that enables test mode (email is not sent)

* = Using these fields will override the default settings for the domain.


This call returns a message receipt if the message was successfully processed, and throws an APIError otherwise.

The message receipt has the following fields:

Attribute Type Description
id string The message submit ID
accepted_recipients number The number of accepted recipients
rejected_recipients number The number of rejected recipients


require "objectia"


client ={
    api_key: api_key,

message = {
    "from" => "",
    "to" => [""],
    "subject" => "Test",
    "text" => "This is a test",
    "attachments" => ["/Me/pictures/photo.jpg"]
    receipt = client.mail.send(message)
    print "Accepted recipients: ", receipt["accepted_recipients"]
rescue Objectia::ResponseError => e
    # Handle error...