Keg-Mail is a basic wrapper around Flask-Mail which gives some added support for templates.

It is not finished by any means and in some ways provides little additional benefit over Flask-Mail.

$ pip install keg-mail

Initialize Keg-Mail in your application

import flask
import keg_mail
from keg.signals import app_ready
from keg import Keg

bp = flask.blueprint('main', __name__)
mail = keg_mail.KegMail()

class App(Keg):
  use_blueprints = [bp]

Initialize the extension with the application

@app_ready.connect
def init_extensions(app):
    """Init custom extensions used by this application"""

    mail.init_app(app)

Define email content

import keg_mail

hello_world_content = keg_mail.EmailContent(
  text='Hello {name}!'
  html='<h1>Hello {name}!</h1>'
)

Send the email

from app import mail
import app.emails as emails
import keg_mail

bp.route('/')
def index():
    mail.send_email(
        '[email protected]',
        keg_mail.Email(
          subject="Hello {name}!",
          content=emails.hello_world_content,
        ).format(name='You")
    )

Test the email

from app import mail

def test_send_mail():
    with mail.record_messages() as outbox:
        resp = app.test_client.get('/')
        assert len(outbox) == 1
        assert outbox[0].subject == "Hello You!"
        assert outbox[0].body == "Hello You!"

Mailgun supports various options such as tagging, user-defined variables, etc. These can be added via a mailgun_opts dictionary that can be passed to the app's mail engine's send method directly:

flask.current_app.mail.send(
    msg,
    mailgun_opts={
        'v:user_name': 'John Doe',
        'v:user_id': 100,
    },
)