aiosmtplib

Introduction

Aiosmtplib is an implementation of the python stdlib smtplib using asyncio, for use in asynchronous applications.

Basic usage:

import asyncio
import aiosmtplib

@asyncio.coroutine
def send_a_message():
    smtp = aiosmtplib.SMTP(hostname='localhost', port=25)
    yield from smtp.connect()
    # Optionnally, login:
    yield from smtp.login('USERNAME', 'PASSWORD')
    yield from smtp.sendmail(
        'Root <root@localhost>',
        ['somebody@localhost'],
        "Hello World",
    )
    yield from smtp.close()

asyncio.get_event_loop().run_until_complete(send_a_message())

Or, with Python 3.5:

import asyncio
import aiosmtplib

async def send_a_message():
    async with aiosmtplib.SMTP(hostname='localhost', port=25) as smtp:
        # Optionnally, login:
        await smtp.login('USERNAME', 'PASSWORD')
        await smtp.sendmail(
            'Root <root@localhost>',
            ['somebody@localhost'],
            "Hello World",
        )

asyncio.get_event_loop().run_until_complete(send_a_message())

And if you need a long-running connection:

import asyncio
import aiosmtplib

smtp = aiosmtplib.AutoReconnectingSMTP(
    hostname='localhost',
    port=25,
    username='USERNAME', # optional
    password='PASSWORD',
)

asyncio.get_event_loop().run_until_complete(asyncio.gather(
    await smtp.sendmail('root@localhost', ['somebody@localhost'], "Hello world"),
    await smtp.sendmail('root@localhost', ['somebody@localhost'], "Goodbye world"),
))

Connecting to an SMTP server

Use an instance of the SMTP class to connect to a server.

Sending messages

Use SMTP.sendmail to send raw messages. The method signature is the same as for standard smtplib.

Use SMTP.send_message to send email.message.Message objects. The method signature is the same as for standard smtplib.