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Introduction

mailables is a developer-centric utility for sending asynchronous mails.

Requirements

Python 3.7+

Installation

$ pip install mailables

Usage

from mailables import Mailer, EmailMessage

message = EmailMessage(
    to='User Name <user@example.com>',
    from_address='sender@example.com',
    subject='Hey',
    text_body='This is sent using mailables!',
    html_body='<b>This is sent using mailables!</b>'
)

mailer = Mailer('smtp://localhost:25')
await mailer.send(message)

Dependencies

Mailables does not have any hard dependencies, but the following are optional:

• aiofiles - required by FileTransport.
• aiosmtpdlib - required by SMTPTransport.

You can install all of these with pip install mailables[full].

Configuration

In order to send email you need to configure transport and mailer. Mailer is a class with which you would work all time. Think it is a public interface to mailables. And transport is a concrete adapter which does actual sending.

from mailables import Mailer

mailer = Mailer('smtp://localhost:25')

When you need to fine-grained control on the transport configuration you may pass the transport instance instead of URL string:

from mailables import Mailer, SMTPTransport
mailer = Mailer(SMTPTransport(host='localhost', port=25))

This approach gives you full control on transport construction.

Note, that you are not limited to one mailer only, your application may have multiple mailers with different transports/settings.

Mail message

The mail message is represented by EmailMessage class.

from mailables import EmailMessage

message = EmailMessage(
    to=['root@localhost', 'admin@localhost'],
    from_address='user@localhost',
    subject='This is a test email',
    text_body='And this is a body',
    html_body='And HTML body <b>supported</b> as well',
)

Attaching files

from mailables import EmailMessage, Attachment

message = EmailMessage(
    attachments=[
        Attachment(contents='CONTENTS', file_name='file.txt')        
    ]
)

# or alternatively using `attach` method:
message.attach(contents='CONTENTS', file_name='file.txt')

# or you can add attachment instance using `add_attachment` method:
message.add_attachment(Attachment('contents'))

Transports

Here is the list of included transports

SMTPTransport

Sends messages using SMTP protocol.

from mailables import SMTPTransport

transport = SMTPTransport(host='localhost', port=25, use_ssl=True)

FileTransport

File transport does not send email to anywhere. It dumps messages into mailbox directory in *.eml format.

from mailables import FileTransport

transport = FileTransport(directory='/tmp/mailbox')

InMemoryTransport

Stores sent emails in a local variable.

from mailables import InMemoryTransport, EmailMessage

storage = []
transport = InMemoryTransport(storage=storage)

# example:
transport.send(EmailMessage(subject='Hey', to='root@localhost'))
assert len(storage) == 1

NullTransport

This transport does not send anything at all. Use it when you want to completely silence the mailer.

from mailables import NullTransport

transport = NullTransport()

Building custom transports

Extend mailables.transport.BaseTransport class and implement async def send(self, message: EmailMessage) method:

For example, we will create a simple transport class for writing mails to a stdout:

from mailables import BaseTransport, EmailMessage, Mailer

class ConsoleTransport(BaseTransport):
    async def send(self, message: EmailMessage):
        print(str(message))


mailer = Mailer(ConsoleTransport())